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Physics

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

Voltmeter
Hydrometer
Ammeter
Thermocouple

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Physics
Water is used in car radiator because of its

High specific heat capacity
Low boiling point
Low density
Easy availability

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Physics
Flywheel is an important part of a steam engine because it :

Decreases the moment of inertia
Helps the engine in keeping the speed uniform
Gives strength to the engine
Accelerates the speed of the engine

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

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

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Physics
During washing of clothes, we use indigo due to its

High glorious nature
Very low cost
Proper pigmental composition
Better cleaning action

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Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

4.33 diopters
-4.33 diopters
12.33 diopters
-12.33 diopters

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