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 Physics Questions

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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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6 1521
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

Explanation:
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0 1514
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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1 1512
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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3 1508
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

Explanation:
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2 1504
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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1 1500
Q:

Contaminated rags are recommended for disposal in landfills.

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

Explanation:
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Subject: Physics
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1 1496
Q:

What type of electromagnetic radiation is used in the remote control of a television?

A) Ultraviolet B) Visible
C) Infrared D) None of the above
 
Answer & Explanation Answer: C) Infrared

Explanation:
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