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Physics

Physics
Conversion of heat into electrical energy is achieved by using :

Hydrometer
Ammeter
Voltmeter
Thermocouple

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Physics
One light year is equal to

2 trillion miles
6 trillion miles
8 trillion miles
9 trillion miles

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Physics
What is the force of attraction between any two bodies by virtue of their masses is called?

Nuclear Force
Electromagnetic Force
Gravitational Force
Centripetal Force

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Physics
Which one of the following is a good electrical conductor?

Charcoal
Graphite
Peat
Diamond

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Physics
The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

10 cm
15 cm
20 cm
5 cm

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Physics
According to special theory of relativity the mass of a particle

Decreases with increase in velocity.
Is independent of its velocity.
Decreases with decrease in velocity.
Increases with increase in velocity with respect to an observer.

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