PHYSICS MULTIPLE CHOICE QUESTIONS SET 31

PHYSICS   

MULTIPLE CHOICE QUESTIONS SET 31

1. What type of electromagnetic radiation is used in the remote control of a television?
A.  Ultraviolet        
B.  Infrared              
C.  None of these                  
D.  Visible
Answer: B Infrared
 
2. Dynamo is a machine which is used for conversion of
A.  Electrical energy to mechanical energy          
B.  Mechanical energy to electrical energy
C.  High voltage to low voltage                   
D.  Low voltage to high voltage
Answer: B Mechanical energy to electrical energy
 
3. Decibel is used to measure
A.  Sound intensity                               
B.  Light intensity
C.  Magnitude of earthquake                     
D.  None of the above
Answer: A Sound intensity
 
4. Which of the following is true when the cells are connected in series?
A.  The emf increases                  
B.  The emf decreases     
C.  Current capacity increases                 
D.  Current capacity decreases
Answer: A The emf increases
 
5. In automatic wrist watches energy is provided by
A.  Manual binding         
B.  Different movements of our hand         
C.  Battery     
D.  Liquid crystal
Answer: B  Different movements of our hand
 
6. Richter scale is used for measuring
A.  Intensity of light    
B.  Velocity of sound    
C.  Intensity of sound   
D.  Amplitude of seismic waves
Answer: D Amplitude of seismic waves
 
7. Einstein got noble prize for
A.  Photo electric effect      
B.  Compton effect       
C.  Theory of relativity       
D.  None of the above
Answer:  A    Photo electric effect
 
8. Night vision cameras do not use
A.  Infrared sensors                 
B.  Amplified light       
C.  X ray radiation from objects             
D.  Heat radiation from objects
Answer: C  X ray radiation from objects
 
9. Which one of the following is the weakest force?
A.  Electrostatic force        
B.  Gravitational force         
C.  Nuclear force    
D.  Electromagnetic force
Answer:  B    Gravitational force
 
10.Which of the following are the discoveries of Albert Einstein?
A.  Radioactivity and photoelectric effect           
B.  X-rays and photoelectric effect
C.  Radioactivity and theory of relativity             
D.  Theory of relativity and photoelectric effect
Answer: D Theory of relativity and photoelectric effect