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Physics

Physics
The unit of electrical power is

Bolt
Kilowatt hour
Watt
Ampere

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Physics
Outside of cooking utensils are generally left black from below because

Black surface is a good conductor of heat.
Black surface is a poor conductor of heat.
Black surface is a good absorber of heat.
It is difficult to clean daily.

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Physics
A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

25 m/s
30 m/s
18 m/s
36 m/s

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Physics
A particle is thrown vertically upward. When it reaches the highest point, it has

A downward velocity
An upward acceleration
A downward acceleration
A horizontal velocity

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Physics
Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes

R/2
5R/4
3R/4
2R

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Physics
The absolute zero is a temperature at which ________

All gases become solid
Molecular motion in a gas would cease
Water freezes
All gases become liquid

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