Physics Questions

Q:

Which electromagnetic wave has the highest frequency?

A) Gamma Rays B) Radio waves
C) X rays D) Microwaves
 
Answer & Explanation Answer: A) Gamma Rays

Explanation:

In all Electromagnetic waves, Gamma Rays have the highest frequency and the lowest wavelength. Whereas Radio ways have lowest Frequency and the highest wavelength. 

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Q:

Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.

A) 12500 B) 20
C) 40 D) 6250
 
Answer & Explanation Answer: A) 12500

Explanation:
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Q:

Instrument for measuring wind velocity is called

A) Coulombmeter B) Anemometer
C) Cyanometer D) Chronometer
 
Answer & Explanation Answer: B) Anemometer

Explanation:
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Q:

Which among the following is a vector quantity?

A) Heat B) Angular momentum
C) Work D) Time
 
Answer & Explanation Answer: B) Angular momentum

Explanation:
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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

Explanation:
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Q:

The frictional force exerted by fluids is also called ________.

A) drag B) buoyancy
C) upthrust D) convection
 
Answer & Explanation Answer: A) drag

Explanation:
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Q:

If an electron and a photon have the same wavelength, then they will have the same

A) velocity B) linear momentum
C) angular momentum D) energy
 
Answer & Explanation Answer: B) linear momentum

Explanation:
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Q:

Contaminated rags are recommended for disposal in landfills.

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

Explanation:
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