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Physics

Physics
Which of the following is an insulator?

Germanium
Glass
Carbon
Mercury

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Physics
Hot springs are heated geothermally by underlying

Mitula
None of these
Magma
Water

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Physics
Which of the following is the unit of Astronomical Distance ?

Sec
Para/sec
Metre/sec
Parsec

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Physics
The velocity of sound in moist air is more than in dry air because the moist air has

More pressure than dry air.
Less pressure than dry air.
More density than dry air.
Less density than dry air.

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Physics
When a number of resistors are connected in series in a circuit, the value of current:

Becomes half
Decreases
Increases
Remains the same

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Physics
The basic reason for the extraordinary sparkle of suitably cut diamond is that

It has a very high transparency
It has well defined cleavage planes
It is very hard
It has a very high refractive index

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