Science Physics MCQ-161

General Science-Physics Online Practice Exam UPSC, CDS, CivilsPrelims, RBI, SSC, NDA, DelhiPolice, UPPSC Exams



The electron emitted in beta radiation originates from

 
 
 
 

Pick out the statement which is true

 
 
 
 

Energy transferred to a person through gamma rays is measured in units of

 
 
 
 

Neutrino is a particle which

 
 
 
 

The fusion of hydrogen into helium is more likely to take place

 
 
 
 

In nuclear fission, the percentage of mass converted into energy is about

 
 
 
 

A good moderator should

 
 
 
 

Energy generation in stars is mainly due to

 
 
 
 

When 15 P30 decays to become 14 Si28 the particle released is :

 
 
 
 

In the following reaction:
12Mg24+2He4 ———

 
 
 
 

In the following nuclear reaction, 6C11 ———

 
 
 
 

In photoelectric effect, the number of photo electrons emitted is proportional to :

 
 
 
 

The maximum number of photo electrons released in photocell is independent of

 
 
 
 

When yellow light is incident on a surface no electrons are emitted while green light can emit. If red light is incident on the surface then ;

 
 
 
 

Photoelectric effect supports quantum nature of light because

 
 
 
 

The matter waves are

 
 
 
 

In the photoelectric effect, electrons are emitted

 
 
 
 

The electrons are emitted in the photoelectric effect from a metal surface :

 
 
 
 

The dual nature of light is exhibited by :

 
 
 
 

Photocells are used for the

 
 
 
 

Photoelectric effect can be explained by assuming that light

 
 
 
 

Which is the incorrect statement of the following

 
 
 
 

The velocity of photo electron emitted in photoelectric effect depends only on

 
 
 
 

1f alpha, beta and gamma rays carry same momentum, which has the longest wavelength

 
 
 
 

The wavelength of the matter waves is independent of