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Physics

Physics
The SI unit of resistance is:

Joule
Ohm
Newton
Coulomb

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Physics
Which tube used to produce X-ray?

Roentgen
None of these
Coolidge tube
X-ray tube

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Physics
Metals are good conductors of electricity because:

They have high melting point.
All of these
The atoms are lightly packed.
They contain free electrons.

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Physics
While ascending a hill, the driver of the vehicle keeps the gear ratio

Equal to 1
Less than 1
Either equal to or greater than 1
Greater than 1

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Physics
Vegetables are cooked in lesser time by adding a pinch of salt while cooking because

Boiling point of water decreases
Boiling point of water increases
Latent heat of vaporization of water decreases
Latent heat of vaporization of water increases

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Physics
A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because

A parachute has a larger surface area and air resistance is more
Stone is heavier than parachute
None of these
Special mechanisms are present in parachute

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