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Physics

Physics
Ultrasound devices operate with minimum frequency from

35 kHz
45 kHz
60 kHz
20kHz

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Physics
In severe winter, in cold countries water pipes burst because

Water expands on freezing
Contraction of water pipes
High atmospheric pressure
Combined effect of all the above three

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Physics
Q = mcdT refers to

Specific Heat formula
Heat Transfer formula
Heat of Vaporization
Enthalpy formula

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Physics
The dimension of which of the following is the same as that of impulse ?

Torque
Change in the rate of momentum
Volume
Momentum

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Physics
Speed in a given direction is called

Displacement
Velocity
Torque
Acceleration

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Physics
The magnifying power of an astronomical telescope can be decreased by

Decreasing the focal length of the eyepiece
Increasing the focal length of the objective
Increasing the focal length of the eyepiece
None of these

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MORE MCQ ON Physics

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