Physics Questions

Q:

1 m/s equals ____________ km/hr

A) 5/16 B) 16/5
C) 18/5 D) 5/18
 
Answer & Explanation Answer: C) 18/5

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Q:

Why metals conduct electricity?

A) Because of low melting point B) Because of high tensile strength
C) Because of free electrons D) Because of high atomic density
 
Answer & Explanation Answer: C) Because of free electrons

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Q:

Which rays cause skin damage?

A) X­-Rays B) UV Rays
C) Infra red rays D) Yellow Rays
 
Answer & Explanation Answer: B) UV Rays

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Q:

Find the acceleration (in m/s2) of a body which accelerates from 10 m/s to 20 m/s in 4 seconds.

A) 7.5 B) 15
C) 5 D) 2.5
 
Answer & Explanation Answer: D) 2.5

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Q:

What is the unit of resistance?

A) ohm B) farad
C) henry D) weber
 
Answer & Explanation Answer: A) ohm

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Q:

Instrument used for measuring specific gravity is called _____.

A) Bathymeter B) Cryometer
C) Areometer D) Cymometer
 
Answer & Explanation Answer: C) Areometer

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Q:

___________________ is defined as the force acting per unit current per unit length on a wire placed at right angles to the magnetic field.

A) Magnetic susceptibility B) Magnetic flux density
C) Magnetic flux D) Magnetic pulse
 
Answer & Explanation Answer: B) Magnetic flux density

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Q:

If a ball is thrown up, which of the following does not change?

A) Acceleration B) Speed
C) Potential energy D) Distance
 
Answer & Explanation Answer: A) Acceleration

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