Physics Questions

Q:

What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

A) 0.5 B) 100
C) 50 D) 1
 
Answer & Explanation Answer: C) 50

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Q:

If a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is

A) 0.2 J B) 5 J
C) 20 J D) 500 J
 
Answer & Explanation Answer: D) 500 J

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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

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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

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Q:

Calculate the time period (in seconds) of a sound wave of wavelength 2m travelling with a speed of 250 m/s.

A) 500 B) 0.008
C) 0.016 D) 250
 
Answer & Explanation Answer: B) 0.008

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Q:

If there were no gravity, which of the following will not be there for a fluid?

A) Viscosity B) Surface Tension
C) Pressure D) Upward Thrust
 
Answer & Explanation Answer: D) Upward Thrust

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Q:

Which type of radiation has the lowest penetrating ability?

A) Alpha B) Beta
C) Gamma D) All of the above
 
Answer & Explanation Answer: A) Alpha

Explanation:

In order of increasing penetration power, alpha particles have the lowest, then beta particles, then gamma rays.

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Q:

AV= constant, where A= area of cross-section and V= velocity of fluid. This equation is called _____.

A) Equation of discontinuity B) Equation of continuity
C) Equation of sustenance D) Equation of parallelism
 
Answer & Explanation Answer: B) Equation of continuity

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