Physics Questions

Q:

The weight of a boy on the surface of the moon is 300 N. The weight of the same boy on the surface of the earth will be

A) 300 N B) 50 N
C) 1800 N D) 5 N
 
Answer & Explanation Answer: C) 1800 N

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Q:

The SI unit of acceleration is _______________.

A) meters per seconds squared B) meters per second
C) seconds per meter D) seconds per meter squared
 
Answer & Explanation Answer: A) meters per seconds squared

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Q:

Humidity is a measure of the _______________.

A) pressure in the air B) viscosity of the air
C) air resistance D) moisture in air
 
Answer & Explanation Answer: D) moisture in air

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Q:

'Parsec' is the unit measurement of

A) Density of stars B) Astronomical distance
C) Brightness of heavenly bodies D) Orbital velocity of giant stars
 
Answer & Explanation Answer: B) Astronomical distance

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Q:

An earthquake of magnitude 6 on Richter scale has ______________ times more destructive energy than an earthquake of magnitude 4.

A) ten B) hundred
C) five D) thousand
 
Answer & Explanation Answer: D) thousand

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Q:

A person holding a pen in his left hand sees his reflection in the mirror holding the pen in his right hand. This is due to which of the following phenomena?

A) Diffused reflection B) Total internal reflection
C) Lateral inversion D) Refraction
 
Answer & Explanation Answer: C) Lateral inversion

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Q:

The frequency of direct current is _____________

A) Zero B) 50 HZ
C) 60 HZ D) 100 HZ
 
Answer & Explanation Answer: A) Zero

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Q:

The force of friction between two surfaces will increase if:

A) a layer of lubricant is kept between the two surfaces B) the two surfaces are pressed harder
C) air gap is created between the two surfaces D) irregularities on both the surfaces are removed
 
Answer & Explanation Answer: B) the two surfaces are pressed harder

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