Exercise 1

Question 16 :

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

A). velocity
B). momentum
C). acceleration
D). kinetic energy
Answer : Option B

Question 17 :

Pick out the scalar quantity

A). force
B). pressure
C). velocity
D). acceleration
Answer : Option B

Question 18 :

Rectifiers are used to convert

A). Direct current to Alternating current
B). Alternating current to Direct current
C). high voltage to low voltage
D). low voltage to high voltage
Answer : Option B

Question 19 :

out of the following, which is not emitted by radioactive substance?

A). Electrons
B). Electromagnetic radiations
C). Alpha particles
D). Neutrons
Answer : Option D

Question 20 :

Sound waves in air are

A). transverse
B). longitudinal
C). electromagnetic
D). polarised
Answer : Option B