PHYSICS MULTIPLE CHOICE QUESTIONS SET 19

PHYSICS  

MULTIPLE CHOICE QUESTIONS SET 19

1. A substance is coloured due to the absorption of
A. Visible light               

B. Microwave radiation                  

C. U.V.light            

D. I.R.radiation
Answer: Option  c
 

2. We cannot see during a fog because of
A. Refraction                 

B. Reflection of light            

C. Scattering of light      

D. Internal reflection
Answer: Option  c
 

3.  In a reactor,cadmium rods are used for
A. speeding neutrons                         

B. absorbing neutrons       
C. dispersing neutrons                       

D. slowly fast neutrons
Answer: Option  b
 

4.  According to kepler’s first law of planetary motion,planets move in
A. circular effects           

B. a parabola                 

C. elliptical orbits                

D. straight lines
Answer: Option  c
 

5. Printing for the blind was introduced by
A. Lousis Braille                 

B. Michael faraday                  

C. Harvey                     

D. Carton
Answer: Option  a
 

6. The science of Cryogenics deals with
A. high temperature        

B. low temperatures             

C. molecular biology        

D. biotechnology
Answer: Option  b
 

7. Which one of the following is a physical change?
A. rusting of iron            

B. boiling of water           

C. burning of candle      

D. boiling of an egg
Answer: Option  b
 

8. At sunrise and at sunset the sky appears red,because
A. red light scatters more                         

B. red light scatters less
C. red light’s intensity is more                  

D. none of the above
Answer: Option  c
 

9. The sky appears to be blue because of
A. reflection of light    

B. refraction of light   

C. scattering of light   

D. total internal reflection of light
Answer: Option  c
 

10. The amount of actual watervapour per unit volume of air is known as its
A. dew point                

B. absolute humidity               

C. relative humidity         

D. condensation point
Answer: Option  b