# Physics - MCQs with answers - Part III

## Physics - MCQs with answers - Part III

Q1. Which one of the following types of waves are used in a night vision apparatus?

a) Radio waves
b) Micro waves
c) Infra-red waves
d)None of the above

View Answer / Hide Answer

ANSWER: d)None of the above

Q2.Consider the following.

1. If the two forces act in the opposite directions on an object ,the net force acting on it is the difference between the two forces.

2. If the force is applied in the direction opposite to the direction of motion then it results in a increase in the speed of the object.

Select the incorrect option:

a)1 only
b)2 only
c)Both
d)None

View Answer / Hide Answer

ANSWER: b)2 only

Explanation- If force applied in the opposite direction to the direction of the motion then speed decreases of the object.

Q3. Winds and cyclones are caused by the differences in the ______

a) Air
b) Pressure
c) Both
d) None

View Answer / Hide Answer

ANSWER: c) Both

Explanation-Air and pressure both are responsible for winds and cyclones.

Q4. Consider the following statement:

A four wheeled vehicle moving in a sharp circular path at high speed will.

1) Overturn about its outer wheels
2) Overturn about its inner wheels
3) Skid outwards
4) Skid inwards

Which of these statements are correct?

a) 1 & 3
b) 2 & 4
c) 2 & 3
d) 1 & 4

View Answer / Hide Answer

ANSWER: c) 2 & 3

Explanation- On sharp circular bend if the outer portion of the road is not raised then the vehicle will skid outward and will overturn about its inner wheels ,because of absence of centripetal force for smooth circular motion.

Q5.Spring Balance is used for measuring

a) The force acting on an objects
b) The force of friction
c) Magnitude of the pressure
d) Relative motion between the objects.

View Answer / Hide Answer

ANSWER: a) The force acting on an objects

Explanation- spring balance is a coiled spring which gets stretched when a force is applied to it.

Q6.In humans, the sound is produced by the

a) Voice box
b) Windpipe
c) Both
d) None

View Answer / Hide Answer

ANSWER: a) Voice box

Explanation-In humans the sound is produced by the voice box or larynx.

Q7.Amplitude and frequency are two important properties of

a) Heat
b) Force
c) Sound
d) light

View Answer / Hide Answer

ANSWER: c) Sound

Q8. Sound can travel through a medium except

a) gases
b) solids
c) liquids
d) Vacuum

View Answer / Hide Answer

ANSWER: d) Vacuum

Explanation-It cannot travel in a vacuum.

Post your comment