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 Physics Questions

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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

Explanation:
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Q:

The least penetrating power ray is

A) Gamma rays B) Beta rays
C) Alpha rays D) None of the above
 
Answer & Explanation Answer: C) Alpha rays

Explanation:

The least penetrating power ray is Alpha rays.

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Q:

Electric power is measured in units of

A) Volt B) Joule
C) Watt D) Ampere
 
Answer & Explanation Answer: C) Watt

Explanation:

Electric power is the rate per unit time, at which electrical energy is transferred by an electric circuit. The power of electricity is measured in watts and kilo watts.

1 Watt is the unit of electrical power equal to one ampere under the pressure of one volt.

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Q:

If electric resistance is to be decreased, then the number of resistances should be connected in ________________

A) Series B) Parallel
C) Mixed arrangement D) None of these
 
Answer & Explanation Answer: B) Parallel

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Q:

Which of the following performs modulation and demodulation?

A) coaxial cable B) modem
C) fiber optic D) satellite
 
Answer & Explanation Answer: B) modem

Explanation:

A modem is a hardware device which performs both modulation and demodulation. MODEM means (Modulator-Demodulator).

 modem_1593758111.png image

 

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Q:

Contaminated rags are recommended for disposal in landfills.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

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Q:

A body in motion essentially acquires

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

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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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