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 Physics Questions

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Q:

What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

A) 0.5 B) 100
C) 50 D) 1
 
Answer & Explanation Answer: C) 50

Explanation:
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0 1982
Q:

We are able to walk on earth without slipping because of

A) Gravitational force B) Frictional force
C) Viscous force D) Centrifugal force
 
Answer & Explanation Answer: B) Frictional force

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2 1979
Q:

Filament of electric bulb is made of _____.

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

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1 1977
Q:

1 WH =

A) 360 joules B) 36000 joules
C) 3600 joules D) 36 joules
 
Answer & Explanation Answer: C) 3600 joules

Explanation:

The watt-hour (WH) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time.

1 WH = 3600 joules.

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4 1975
Q:

An ideal gas cannot be

A) liquified B) solidified
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) liquified

Explanation:

An ideal gas cannot be liquified because forces between the molecules are negligible.

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2 1970
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

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6 1968
Q:

Thermohaline circulation is mainly due to

A) cold, dense ocean water sinking and warmer water replacing it B) winds causing circulation of ocean water
C) warmer, less dense water sinking in the ocean and cold water replacing it D) warm water being added to the ocean due to industial waste
 
Answer & Explanation Answer: A) cold, dense ocean water sinking and warmer water replacing it

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3 1965
Q:

Granite is the examples of which rock ?

A) Igneous rock B) Sedimentary rock
C) Calcareous rock D) Matamorphic
 
Answer & Explanation Answer: A) Igneous rock

Explanation:

It forms slow crystallization of magma below Earth's surface.Granite is a hard light-colored igneous rock and it is composed mainly of quartz and feldspar with minor amounts of mica, amphiboles and other minerals it is mainly used for building and monuments

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1 1959