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Physics

Physics
Lakes freeze in cold countries in winter, leaving the water underneath at

4°F
0°C
4°C
0°F

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Physics
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because

There is no air or any other gas in the bell jar
The bell jar is too small
The ringing is not loud enough
The glass of the bell jar absorbs the sound waves

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Physics
The spring balance works on the principle of ________ .

Hooke's Law
Boyle's Law
Bernoulli's principle
Pascal's Law

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Physics
The propagation of sound waves in a gas involves

Isobaric compression and rarefaction
Isochoric compression and rarefaction
Isothermal compression and rarefaction
Adiabatic compression and rarefaction

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Physics
The waveform of a certain signal can be studied by

P – n junction diode
Spectrometer
Cathode ray oscilloscope
Sonometer

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Physics
Which type of mirror is used in the head lights of vehicles ?

Plane mirror
Convex mirror
Parabolic mirror
Concave mirror

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MORE MCQ ON Physics

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