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 Physics Questions

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Q:

A boy is swinging a ball attached to a string in a horizotal circle. If the string snaps 

A) the ball will travel towards the center of the circle and fall down B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
C) it will fall down at the same place where the string breaks D) None of these
 
Answer & Explanation Answer: B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

Explanation:

The centripetal force having been removed the body cannot  execute the curved path

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Q:

In human relations, the irritation threshold is the

A) length of time an annoying behavior continues B) action that causes an annoyance
C) frequency of the annoying behavior D) point at which a person notices something and becomes annoyed
 
Answer & Explanation Answer: D) point at which a person notices something and becomes annoyed

Explanation:
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Q:

One billionth of a second is called

A) microsecond B) picoseconds
C) millisecond D) nanosecond
 
Answer & Explanation Answer: D) nanosecond

Explanation:

A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second or one billionth of a second.

 

  • That is, 1/1,000,000,000 of a second, or 10^−9 seconds.
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Q:

which of the following has the longest wavelength

A) Infrared radiation B) γ-radiation
C) Ultraviolet radiation D) Visible radiation
 
Answer & Explanation Answer: A) Infrared radiation

Explanation:

Infrared radiation

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Q:

The rate at which energy is transferred is called

A) Power B) Watt
C) Volt D) Potential
 
Answer & Explanation Answer: A) Power

Explanation:

Energy can be transferred from one system to the other. The rate at which energy is transferred from one system to other system is called POWER. Energy transferred in one second is called a watt.

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Q:

Which of the following is a Non Renewable Resource of Energy?

A) Wind Power B) Hydrogen Fuel
C) Natural Gas D) Solar Energy
 
Answer & Explanation Answer: C) Natural Gas

Explanation:

Natural Gas is a Non Renewable Resource of Energy because that does not renew itself once used, unlike the other choices. 

It is a resource that will not be naturally replenished.

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Q:

Forces of attraction limit the motion of particles most in solids.

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

Explanation:

We know that, solids have definite shapes and definite volumes, whereas liquids have definite volumes but indefinite shapes and coming to gases it has indefinite volumes and indefinite shapes.


 


Hence, only in solids, the forces of attraction limit the motion of particles.

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Q:

The rate of flow of electric charge is measured in

A) ampere B) coulomb
C) ampere/coulomb D) ampere-coulomb
 
Answer & Explanation Answer: A) ampere

Explanation:
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