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 Physics Questions

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Q:

Which part of the flame is the hottest?

A) Blue Zone B) Luminous Zone
C) Dark Zone D) Non - Luminous Zone
 
Answer & Explanation Answer: A) Blue Zone

Explanation:

Blue Zone is the hottest part of the flame that is where the flame has the most Oxygen and you are getting complete combustion. It is about 1400 degrees Centigrades. The Reddish part (Non - Luminous Zone) is the coolest part, about 800 deg C.

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Q:

Energy stored in the nucleus of an atom is called

A) Nuclear energy B) Atomic energy
C) Potential energy D) Kinetic energy
 
Answer & Explanation Answer: A) Nuclear energy

Explanation:
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Q:

The law of conservation of energy states that

A) energy can neither be created nor destroyed B) energy can either be created nor destroyed
C) energy can neither be created or destroyed D) energy can either be created or destroyed
 
Answer & Explanation Answer: A) energy can neither be created nor destroyed

Explanation:

The law of conservation of energy is a law of science which states that energy can neither be created nor destroyed - only converted from one form of energy to another.

In 1842, Julius Robert Mayer discovered the Law of Conservation of Energy.

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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:

Depth of ocean is measured by

A) Animometer B) Aerometer
C) Siesmometer D) Fathometer
 
Answer & Explanation Answer: D) Fathometer

Explanation:

Fathometer is used to measure the depth of the ocean.

depth_of_ocean_is_measured_by1542975982.jpg image

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Q:

The combined gas law relates which of the following?

A) Volume & Temperature B) Temperature & Pressure
C) Volume & Pressure D) Volume, Temperature & Pressure
 
Answer & Explanation Answer: D) Volume, Temperature & Pressure

Explanation:

The combined gas law states that the ratio between the pressure-volume product and the temperature of a system remains constant.

 

Hence it depends on all the three Volume, Temperature & Pressure.

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Q:

A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the bodyis: [Given g = 9.8 m/s]

A) 1568 J B) 1568 C
C) 1568 W D) 1568 N
 
Answer & Explanation Answer: A) 1568 J

Explanation:
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Q:

The temperature at which water boils depends mainly on

A) Air Pressure B) Specific heat
C) Density D) Relative humidity
 
Answer & Explanation Answer: A) Air Pressure

Explanation:

The temperature at which water boils depends mainly on air pressure.

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