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Physics

Physics
What type of simple machine is an axe?

Lever
The screw
Wedge
Both A & B

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

Voltmeter
Ammeter
Thermocouple
Hydrometer

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Physics
The audio signals of TV are

Amplitude modulated
Unmodulated
Frequency modulated
Velocity modulated

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Physics
Water will not be vapourised if

The humidity is 0%
The temperature is 100°C
The humidity is 100%
The temperature is 0°C

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Physics
Temperature of distant luminous bodies can be determined by

Gas thermometers
Mercury thermometers
Pyrometers
Colour thermometers

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Physics
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?

3.3 km, 0.30 km
2.8 km, 0.25 km
1.8 km, 0.15 km
2.2 km, 0.20 km

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