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Physics

Physics
The velocity of sound is more in

Water
Air
Steel
Wood

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Physics
At hill stations, the boiling point of water will be

Less than that at sea level
More than that at sea level
Same as at sea level
Equal to the melting point of ice

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Physics
Rectifiers are used to convert:

High voltage to low voltage
Low voltage to high voltage
Alternating current to Direct current
Direct current to Alternating current

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Physics
The rice is cooked more quickly in a pressure cooker because

None of these
Water boils at a higher temperature under pressure.
It is covered.
Less quantity of water is used.

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Physics
Which among the following is false about displacement?

It is always positive
Displacement is never greater than Distance
It can be positive, negative or zero
Its SI unit is meter

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Physics
Lens is made up of which glass

Flint glass
Cobalt glass
Pyrex glass
Ordinary glass

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