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Physics

Physics
Ultrasound devices operate with minimum frequency from

20kHz
60 kHz
45 kHz
35 kHz

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Physics
The fundamental scientific principle in the operation of battery is

Dissociation of electrolytes
Oxidation-reduction
Dialysis
Acid-base interaction

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Physics
The atmospheric layer reflecting radio waves is called

Ozonosphere
Mesosphere
Stratosphere
Ionosphere

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Physics
Woollen cloth protects the body from cold because

It is a poor conductor of heat
It reflects heat
It is a good conductor of heat
External heat rays enter into the body through the woollen cloth

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Physics
Lightning heats the surrounding air to

3000 deg Cent
300000 deg Cent
300 deg Cent
30000 deg Cent

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Physics
The energy emitted by the Sun is due to

All of these
Chemical reaction
Nuclear fusion
Nuclear fission

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MORE MCQ ON Physics

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