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Physics

Physics
The unit of intensity of electric field is

J/c
N/c
N/m
Volt

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Physics
Sound waves cannot travel in

Hydrogen gas
Vacuum
Glass
Water

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Physics
Which of the following causes adiabatic temperature changes in atmosphere?

Deflection and advection
Expansion and compression of the air
Latent heat of condensation
Partial absorption of solar radiation by the atmosphere

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Physics
In which of the following cases, kinetic energy is being used in performing work ?

Driving a car to cover a distance
Wind mill grinding wheat grain
Rowing a boat in the lake
Paddling the bicycle to cover a distance

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Physics
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :

1
2
1.5
1.2

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Physics
Friction is caused by the ________ on the two surfaces in contact.

Irregularities
Densities
Gaps
Smoothness

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