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Physics

Physics
Red light has a wavelength of 70 A°. In "nm" it is

700 nm
7 nm
0.07 nm
70 nm

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Physics
What is the unit of the physical quantity Entropy?

Newton per kelvin
Joule per kelvin
Pascal per kelvin
Watt per kelvin

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Physics
Rainbow is seen after rain because of hanging molecules of water which act as

Mirrors
Lenses
Prisms
Slabs

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

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

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Physics
When a number of resistors are connected in series in a circuit, the value of current:

Remains the same
Decreases
Becomes half
Increases

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Physics
Remote-sensing device has an inbuilt source of

X-ray
Infrared ray
Ultraviolet ray
G-ray

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MORE MCQ ON Physics

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