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Q:

Why is weightlessness experienced while orbiting the earth in space ships ?

A) Inertia B) Acceleration
C) Zero gravity D) Orbital motion
 
Answer & Explanation Answer: C) Zero gravity

Explanation:
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Q:

In a transformer the tappings are generally provided on

A) Primary side B) low voltage side
C) High voltage side D) Secondary side
 
Answer & Explanation Answer: C) High voltage side

Explanation:

Tappings are provided in order to maintain the terminal voltage across the loads within the permissible specified limits with respect to load variations.

Generally tappings are preferred on HV side, because the HV side is low current side, tap changer involves low current interruption and large variations or small steps are possible due to more no of turns.

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Q:

In _____________ motion of a body its velocity varies with time.

A) uniform B) linear
C) equilibrium D) non-uniform
 
Answer & Explanation Answer: D) non-uniform

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Q:

When a bullet is fired from a gun, the gun moves in the opposite direction. This illustrates Newton's

A) third law of motion B) first and second law of motion
C) first law of motion D) second law of motion
 
Answer & Explanation Answer: A) third law of motion

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Q:

Which is the form of energy that does NOT occur while riding a bicycle?

A) Heat energy B) Kinetic energy
C) Chemical energy D) Mechanical energy
 
Answer & Explanation Answer: C) Chemical energy

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Q:

In the gamma decay of a nucleus

A) the mass number of the nucleus changes whereas its atomic number does not change B) the mass number of the nucleus does not change whereas its atomic number changes
C) both the mass number and the atomic number of the nucleus change D) neither the mass number nor the atomic number of the nucleus changes
 
Answer & Explanation Answer: D) neither the mass number nor the atomic number of the nucleus changes

Explanation:

The emission of gamma rays does not alter the number of protons or neutrons in the nucleus but instead has the effect of moving the nucleus from a higher to a lower energy state (unstable to stable)

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Q:

Due to an acceleration of 1 m/s2 the velocity of a body increases from 15 m/s to 20 m/s in a certain period. Find the displacement (in m) of the body in that period.

 

A) 175 B) 625  
C) 87.5 D) 312.5
 
Answer & Explanation Answer: C) 87.5

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Q:

Which of the following is NOT based on principle of relationship between volume and pressure of air?

A) Fountain pen B) Bicycle pump
C) Hand pump D) Pulley
 
Answer & Explanation Answer: D) Pulley

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