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Physics

Physics
The speed of sound travel fastest through

None of these
Gas
Solid
Liquid

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Physics
Atmospheric pressure exerted on earth is due to

Uneven heating of earth
Revolution of earth
Rotation of earth
Gravitational pull

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Physics
Force of impact is the force

None of these
By the speed of the object
When the objects meet
By the objects weight

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Physics
Which among the following is false about displacement?

Its SI unit is meter
It can be positive, negative or zero
It is always positive
Displacement is never greater than Distance

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Physics
The width of depletion layer of a P-N junction

Is increased under reverse bias
Increases with heavy doping
Decreases with light doping
Is independent of applied voltage

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Physics
Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is

Homogeneous and transparent
Inhomogeneous and transparent
Of variable refractive index
Made up of slabs of different refractive indices

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