PHYSICS MULTIPLE CHOICE QUESTIONS SET 25

 PHYSICS   

MULTIPLE CHOICE QUESTIONS SET 25

1. The normal temperature of human body on the kelvin scale is
A. 280               
B. 290                    
C. 310                       
D. 340
Answer: Option  c
 
2. Hydrogen bomb involves the principle of
A. Nuclear fission            
B. Nuclear fusion             
C. Newton’s law             
D. Coulomb law
Answer: Option  b
 
3. Who discovered X–ray?
A. Madam curie                  
B. Einstein              
C. Roentgen                 
D. J.J. Thomson
Answer: Option  c
 
4. X–rays cannot penetrate through
A. aluminium                    
B. lead                
C. wood                      
D. iron
Answer: Option  b
 
5. The radiation with highest energy is
A. UV                   
B. IR                   
C. X–ray                       
D. Visible
Answer: Option  c
 
6. Magnetron is used for the production of
A. X–rays                  
B. Cathode rays               
C. Microwaves                
D. Positive rays
Answer: Option  c
 
7. The electric device with thermostat is
A. radio               
B. electric bulb                   
C. fan                          
D. iron box
Answer: Option  d
 
8. The fuse of wire is made of
A. nichrome                  
B. led–tin alloy            
C. tungsten                
D. copper
Answer: Option  b
 
9. The lowest level energy band in a solid is called
A. valence band            
B. conduction band               
C. fermi level            
D. equal level
Answer: Option  a
 
10. Solar energy is produced by the following reaction
A.  Chemical reaction           
B.  Fission reaction        
C.  Fusion reaction          
D.  None of these
Answer: C (Fusion reaction)