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 Physics Questions

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Q:

Which measurement depends on gravitational force?

A) Mass B) Weight
C) Height D) All of the above
 
Answer & Explanation Answer: B) Weight

Explanation:

We know that,

Weight W = mg. That is mass times gravitational force.

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Q:

A voltaic cell converts chemical energy to

A) Heat energy B) Electrical energy
C) Mechanical energy D) Light energy
 
Answer & Explanation Answer: B) Electrical energy

Explanation:

A galvanic cell is also known as voltaic cell provides electrical energy from the chemical energy.

 

a_voltaic_cell_converts_chemical_energy_to1558088421.png image

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Q:

Force of impact is the force

A) by the objects weight B) by the speed of the object
C) when the objects meet D) None of the above
 
Answer & Explanation Answer: C) when the objects meet

Explanation:

Force of impact is the force when the objects meet. The speed of the object plays an important role in the generation of force of impact. The laws of physics determine that the force of impact increases with the square of the increase in speed.

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Q:

A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

A) 150 J B) 100 J
C) 50 J D) 75 J
 
Answer & Explanation Answer: A) 150 J

Explanation:
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Q:

The coil wire in the electric room heater or electric cooking heater is called __________.

A) Circuit B) Element
C) Filament D) Cells
 
Answer & Explanation Answer: B) Element

Explanation:
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Q:

Air pressure is measured in which of the following units?

A) Steridian B) kg/mts
C) Newton D) Pascal
 
Answer & Explanation Answer: D) Pascal

Explanation:

Pressure = (Net Force) / (Applied area) = Newton / square meters


Measuring units of pressure are:

. Pascal
. Bar
. Torr
. Pounds per square inch (psi)
. Standard atmosphere (atm).

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Q:

Sound waves cannot travel through

A) Gas B) Liquid
C) Vacuum D) Solid
 
Answer & Explanation Answer: C) Vacuum

Explanation:

Sound waves cannot travel through a Vacuum.

 

A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.

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Q:

Tensional forces normally cause which one of the following?

A) normal faults B) strike-slip faults
C) thrust faults D) reverse faults
 
Answer & Explanation Answer: A) normal faults

Explanation:

Tensional forces normally cause normal faults.

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