Увеличится в 4 раза                                                                                                                                                



Дидактическая единица: " Механические и электромагнитные колебания и волны Материальная точка совершает гармонические колебания с амплитудой А = 4 см и периодом Т = 2 с. Если смещение точки в момент времени, принятый за начальный, равно своему максимальному значению, то точка колеблется в соответствии с уравнением (в СИ) ... 1                                                                                                                                                             2                                                                                                                                                            3                                                                                                                                                             4                                                                                                                                                               Период колебаний математического маятника при увеличении его массы в 2 раза ... 1 уменьшится в 2 раза                                                                                                                                               2 увеличится в 2 раза                                                                                                                                                3                                                                                                                                            

Не изменится                                                                                                                                                            

 

Уменьшение амплитуды колебаний в системе с затуханием характеризуется временем релаксации. Если при неизменном коэффициенте трения среды увеличить в 2 раза массу грузика на пружине, то время релаксации ...

1 уменьшится в 2 раза                                                                                                                                              

2 уменьшится в 4 раза                                                                                                                                              

3 увеличится в 4 раза                                                                                                                                               

Увеличится в 2 раза                                                                                                                                                

 

Период свободных колебаний пружинного маятника равен Т. В некоторый момент времени кинетическая энергия груза энергия достигает максимума. Через какое минимальное время она снова достигнет максимума ...

1 достигнет нового максимума через время T/4                                                                                                   

2 достигнет нового максимума через время Т                                                                                                      

3 достигнет нового максимума через время 3T/4                                                                                                 

Достигнет нового максимума через время T/2                                                                                                  

 

Частота вынужденных колебаний ...

1 больше частоты внешнего воздействия                                                                                                              

2 меньше частоты внешнего воздействия                                                                                                             

3 увеличивается с течением времени                                                                                                                     

4 равна частоте свободных колебаний                                                                                                                  

Равна частоте внешнего воздействия                                                                                                                 

 

 

Частота свободных затухающих колебаний системы ...

1 больше собственной частоты системы                                                                                                               

2 равна собственной частоте системы                                                                                                                   

3 уменьшается с течением времени                                                                                                                        

4 увеличивается с течением времени                                                                                                                     

Меньше собственной частоты системы                                                                                                              

 

 

 

1 2 с                                                                                                                                                                            

2 0,25 с                                                                                                                                                                       

3 0,5 с                                                                                                                                                                         

С                                                                                                                                                                               

 

 

 

1                                                                                                                                              

2                                                                                                                                            

3                                                                                                                                            

4                                                                                                                                          

 

1                                                                                                                                              

2                                                                                                                                              

3                                                                                                                                            

4                                                                                                                                           

 

 

 

1 1 м/с                                                                                                                                                                         

2 0,25 м/с                                                                                                                                                                    

3 0,125 м/с                                                                                                                                                                  

4 4 м/с                                                                                                                                                                         

М/с                                                                                                                                                                    

 

 

 

1 0,5                                                                                                                                                                            

2 4                                                                                                                                                                               

3 2                                                                                                                                                                               

4 0,25                                                                                                                                                                             

 

 

 

1 вынужденных колебаний                                                                                                                                     

2 свободных затухающих колебаний                                                                                                                     

Свободных незатухающих колебаний                                                                                                                 

 

 

 

1 1,884 м/с                                                                                                                                                                  

2 0,45 м/с                                                                                                                                                                    

3 0,9 м/с                                                                                                                                                                      

4                                                                                                                                                                        

 

 


1 вынужденных колебаний                                                                                                                                     

2 свободных незатухающих колебаний                                                                                                                 

Свободных затухающих колебаний                                                                                                                     

 

 

1 свободных затухающих колебаний                                                                                                                     

2 свободных незатухающих колебаний                                                                                                                 

Вынужденных колебаний                                                                                                                                      

 

Бегущая волна переносит в пространстве:

1 массу                                                                                                                                                                       

2 частицы                                                                                                                                                                  

3 вещество                                                                                                                                                                 

Импульс                                                                                                                                                                    

Энергию                                                                                                                                                                     

 

 

В газовой среде распространяются ...

1 только поперечные волны                                                                                                                                    

2 поперечные и продольные волны                                                                                                                       

Только продольные волны                                                                                                                                   

 

 

Для плоской волны справедливо утверждение ...

1 волновые поверхности имеют вид концентрических сфер                                                                             

2 амплитуда волны обратно пропорциональна расстоянию до источника колебаний (в непоглощающей среде)                                                                                                                                                                            

3 амплитуда волны не зависит от расстояния до источника колебаний (при условии, что поглощением среды можно пренебречь)                                                                                                                 

 

 

Для поперечной волны справедливо утверждение ...

1 частицы среды колеблются в направлении распространения волны                                                             

2 возникновение волны связано с деформацией сжатия-растяжения                                                                

Частицы среды колеблются в направлениях, перпендикулярных направлению распространения волны                                                                                                                                                                             

 

 

Для сферической волны справедливо утверждение ...

1 амплитуда волны не зависит от расстояния до источника колебаний (при условии, что поглощением среды можно пренебречь)                                                                                                                                          

2 волновые поверхности имеют вид параллельных друг другу плоскостей                                                    

Амплитуда волны обратно пропорциональна расстоянию до источника колебаний (в непоглощающей среде)                                                                                                                                               

 

 

Если увеличить в 2 раза объемную плотность энергии и при этом увеличить в 2 раза скорость распространения упругих волн, то плотность потока энергии ...

1 увеличится в 2 раза                                                                                                                                               

2 останется неизменной                                                                                                                                           

увеличится в 4 раза                                                                                                                                                

 

Из приведенных выражений уравнением сферической бегущей волны является ...

1                                                                                                                                              

2                                                                                                                                        

3                                                                                                                                               

4                                                                                                                                   

5                                                                                                                                            

 

 

Поперечные волны могут распространяться только в ...

1 газах                                                                                                                                                                        

2 жидкостях                                                                                                                                                               

3 газах и твердых телах                                                                                                                                           

4 жидкостях и твердых телах                                                                                                                                  

Твердых телах                                                                                                                                                         

 

 

Стоячие волны отличаются от бегущих тем, что они не переносят в пространстве ...

1 массу                                                                                                                                                                       

2 вещество                                                                                                                                                                 

3 частицы                                                                                                                                                                  

Энергию                                                                                                                                                                     

 

 

Уравнение бегущей вдоль оси х волны имеет вид ...

1                                                                                                                                        

2                                                                                                                                                

3                                                                                                                                   

4                                                                                                                                   

 

 

 

1 10 Гц                                                                                                                                                                       

2 3,14 Гц                                                                                                                                                                    

3 6,28 Гц                                                                                                                                                                    

Гц                                                                                                                                                                            

 

 

1 2                                                                                                                                                                               

2 0,5                                                                                                                                                                            

3 3,14                                                                                                                                                                             

 

 

1 0,5                                                                                                                                                                            

2 5                                                                                                                                                                               

3 2                                                                                                                                                                                  

 

 


 

1 3,5                                                                                                                                                                            

2 3,4,5                                                                                                                                                                         

3 1,3,5                                                                                                                                                                         

4 1,2,3                                                                                                                                                                         

5 2,4                                                                                                                                                                               

 

 


 

1 1,2,3                                                                                                                                                                         

2 3,4,5                                                                                                                                                                         

3 2,4                                                                                                                                                                            

4 3,5                                                                                                                                                                            

5 1,3,5                                                                                                                                                                            

 


 

1 2 Гц                                                                                                                                                                         

2 1,36 Гц                                                                                                                                                                    

3 5 Гц 4) 0,68 Гц                                                                                                                                                        

Гц                                                                                                                                                                         

 

 


 

1 1 м                                                                                                                                                                           

2 0,02 м                                                                                                                                                                      

3 0,2 м                                                                                                                                                                        

М                                                                                                                                                                           

 

 


 

1                                                                                                                                    

2                                                                                                                                  

3                                                                                                                             

4                                                                                                                                   

 

 


 

1 10 кг                                                                                                                                                                        

2 1 т                                                                                                                                                                            

3 0,01 кг                                                                                                                                                                     

4 0,1 кг                                                                                                                                                                          

 

 


 

1 20 Дж                                                                                                                                                                      

2 40 Дж                                                                                                                                                                      

3 0,004 Дж                                                                                                                                                                 

4 0,002 Дж                                                                                                                                                                    

 

 


 

1 3,75 Гц                                                                                                                                                                    

2 2,5 Гц                                                                                                                                                                      

3 0,8 Гц                                                                                                                                                                      

Гц                                                                                                                                                                       

 

 


 

1                                                                                                                                                                            

2                                                                                                                                                                            

3                                                                                                                                                                            

4                                                                                                                                                                            

 

 

 

1                                                                                                                                                                            

2                                                                                                                                                                            

3                                                                                                                                                                            

4                                                                                                                                                                            

 

 

При увеличении в 2 раза амплитуды колебаний векторов напряженности электрического и магнитного полей плотность потока энергии ...

1 увеличится в 2 раза                                                                                                                                               

2 останется неизменной                                                                                                                                           


Дата добавления: 2018-02-18; просмотров: 311; ЗАКАЗАТЬ РАБОТУ