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Physics

Physics
Conversion of heat into electrical energy is achieved by using :

Ammeter
Hydrometer
Thermocouple
Voltmeter

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Physics
A doppler effect occurs when a source of sound moves

None of these
Both A & B
Away from you
Towards you

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Physics
A decibel is

A measure of sound level
A musical note
The wavelength of noise
A musical instrument

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Physics
When a barometer is rising air pressure is

Increasing
Zero
Decreasing
Constant

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Physics
What type of lens is a magnifying glass?

Converging
Spherical
Diverging
Achromatic

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Physics
During washing of clothes, we use indigo due to its

Very low cost
Better cleaning action
High glorious nature
Proper pigmental composition

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