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 Physics Questions

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Q:

A permanent magnet can affect

A) Magnets B) Electromagnets
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

A permanent magnet can affect both magnets and electromagnets.

a_permanent_magnet_can_affect1559196137.jpg image

A permanent magnet has natural magnetic properties while a temporal magnet is created by artificial means. Permanent magnets do not lose their magnetic ability.

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Q:

The unit for measuring electric power is the

A) Steridian B) Watts
C) Watts D) Volts
 
Answer & Explanation Answer: C) Watts

Explanation:
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Q:

The magnitude of buoyant force depends on the .......... of the fluid.

A) mass B) temperature
C) volume D) density
 
Answer & Explanation Answer: D) density

Explanation:
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Q:

The energy associated with motion is called

A) Potential energy B) Kinetic energy
C) Both A & B D) Stored energy
 
Answer & Explanation Answer: B) Kinetic energy

Explanation:

Energy can be either potential or kinetic. The energy associated with motion is called Kinetic energy and similarly, the energy associated with position is called Potential energy.

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Q:

Radiocarbon dating technique is used to estimate the age of

A) fossils B) rocks
C) monuments D) soil
 
Answer & Explanation Answer: A) fossils

Explanation:

Radiocarbon dating also referred to as carbon dating or carbon-14 dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.

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Q:

Weight of a person at a height of 2R from the centre of the earth, where R is the radius of the earth _______.

A) remains same B) becomes half
C) becomes twice D) becomes one­-fourth
 
Answer & Explanation Answer: D) becomes one­-fourth

Explanation:
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Q:

Filament of electric bulb is made of _____.

A) Magnesium B) Lead
C) Tin D) Tungsten
 
Answer & Explanation Answer: D) Tungsten

Explanation:
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Q:

The solubility of a gas in a liquid is

A) increased with increasing pressure B) decreased with increasing temperature
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The solubility of a gas in a liquid is directly and inversely proportional to pressure and temperature respectively.

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