Physics Questions

Q:

Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?

A) Pyrometer B) Thermocouple
C) Thermometer D) Thermistor
 
Answer & Explanation Answer: A) Pyrometer

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Q:

Which phenomena shows the particle nature of light?

A) Diffraction B) Interference
C) Photoelectric effect D) Polarisation
 
Answer & Explanation Answer: C) Photoelectric effect

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Q:

Mohan, having a mass of 40 kg, runs up a staircase of 50 steps in 10 s. If the height of each step is 15 cm, then what is his power?

A) 300 W B) 200 W
C) 100 W D) 400 W
 
Answer & Explanation Answer: A) 300 W

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Q:

The unit of measurement of noise is

A) Decibel B) Hertz
C) Amplifier D) Acoustics
 
Answer & Explanation Answer: A) Decibel

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Q:

If a body slides over a surface, the force resisting the motion between them is called ______.

A) Centripetal force B) Friction
C) Centrifugal force D) Inertia
 
Answer & Explanation Answer: B) Friction

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Q:

______ is the perpendicular distance between point of application of force and axis of rotation.

A) Moment arm B) Moment of Inertia
C) Altitude D) Base
 
Answer & Explanation Answer: A) Moment arm

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Q:

Why the Earth is having its own atmosphere ?

A) Winds B) Clouds
C) Gravity D) Rotation of the Earth
 
Answer & Explanation Answer: C) Gravity

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Q:

The distance-time graph for the motion of an object moving with a constant speed is a __________.

A) Dot B) Circle
C) Straight Line D) Curve
 
Answer & Explanation Answer: C) Straight Line

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