PHYSICS MULTIPLE CHOICE QUESTIONS SET 28

PHYSICS   

MULTIPLE CHOICE QUESTIONS SET 28

1. In which of the following cases lies the broadcast band of FM?
A.  VHF          
B.  UHF           
C.  SHF              
D.  HF
Answer: C (SHF)
 
2. Stars are twinkling due to
A. Scattering            
B. Refraction             
C. Diffraction                 
D. Reflection
Answer: B (Refraction)
 
3. Laser is a device for producing
A.  Spontaneous radiation                  
B.  Stimulated radiation    
C.  Scattered radiation                   
D.  Dispersed radiation
Answer: B Stimulated radiation
 
4. Which of the following is the smallest unit of length?
A.  Micrometer              
B.  Fermimetre              
C.  Angstrom                  
D.  Nanometer
Answer: B Fermimetre
 
5. Sound travels in the form of
A.  Stationary waves              
B.  Longitudinal waves      
C.  Transverse waves     
D.  None of the above
Answer: B Longitudinal waves
 
6. In television broadcast, the picture signals are transmitted by
A.  Phase modulation                              
B.  Angle modulation       
C.  Amplitude modulation                      
D.  Frequency modulation
Answer: D (Frequency modulation)
 
7. A dynamo which is said to generate electricity actually acts as a
A.  Source of electric charge     
B.  Converter of energy   
C.  Source of ions   
D.  Source of electrons
Answer: B (Converter of energy)
 
8. Radioactivity was discovered by
A.  Bohr          
B.  Madame Curie                
C.  Henry Becquerel                       
D.  Rutherford
Answer: C (Henry Becquerel)
 
9. Wavelength range of visible light is
A.  200-900 nm          
B.  600-780 nm              
C.  300-800 nm               
D.  390-780 nm
Answer: D (390-780 nm)
 
10. Which one of the following is not needed in a nuclear fission reactor?
A.  Moderator             
B.  Coolant           
C.  Control device                
D.  Accelerator
Answer: D (Accelerator)