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Physics

Physics
Which of the following is a conductor of electricity ?

Benzene
Salt water
Rubber
Pure water

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Physics
Ventilators are provided near the ceiling of the room because

The exhaled warmer air rises up and goes out
These provide cross ventilation in the room
These provide some sunlight in the room
These do not look nice in the lower part

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Physics
Beta rays emitted by a radioactive material are

The electrons orbiting around the nucleus
Electromagnetic radiations
Charged particles emitted by nucleus
Neutral particles

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Physics
The weight of a body acts through the centre of

Gravity
Buoyancy
Both (A) and (B)
Mass

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Physics
Sending a frame to a group of stations is known as

Multicasting
Spreading
Single casting
Casting

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Physics
Echolocation is an adaptation bats use to

Hunt insects in flight
All of these
Find warm places for hibernation
Locate flowering plants

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