Physics Questions

Q:

The odometer guage indicates

A) the distance travelled by a vehicle B) the depth of the ocean
C) pitch length D) frequency of the wave
 
Answer & Explanation Answer: A) the distance travelled by a vehicle

Explanation:

The odometer or the odograph is an instrument used to indicate the distance travelled by the vehicle.

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Q:

Weight of a person at a height of 2R from the centre of the earth, where R is the radius of the earth _______.

A) remains same B) becomes half
C) becomes twice D) becomes one­-fourth
 
Answer & Explanation Answer: D) becomes one­-fourth

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Q:

Speed of light is maximum in _____.

A) vacuum B) solids
C) liquids D) gases
 
Answer & Explanation Answer: A) vacuum

Explanation:
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Q:

During the motion of a projectile fired from the earth surface, _______

A) its kinetic energy remains constant B) its momentum remains constant
C) vertical component of its velocity remains constant D) horizontal component of its velocity remains constant
 
Answer & Explanation Answer: D) horizontal component of its velocity remains constant

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Q:

What is the escape velocity of the rocket in the earth is?

A) 12.2 km/sec B) 10.2 km/sec
C) 13.2 km/sec D) 11.2 km/sec
 
Answer & Explanation Answer: D) 11.2 km/sec

Explanation:
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Q:

Which of the following has the lowest frequency?

A) Visible light B) Gamma rays
C) X­-rays D) Ultra violet rays
 
Answer & Explanation Answer: A) Visible light

Explanation:
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Q:

The unit for measuring electric power is the

A) Steridian B) Watts
C) Watts D) Volts
 
Answer & Explanation Answer: C) Watts

Explanation:
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Q:

Why does a fountain pen leak in aeroplane flying at a height?

A) Because of reduced viscosity of the ink in the pen B) Because of increased viscosity of the ink in the pen
C) Because of higher atmospheric pressure outside the pen D) Because of lower atmospheric pressure outside the pen
 
Answer & Explanation Answer: D) Because of lower atmospheric pressure outside the pen

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