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Physics

Physics
Which one of the following is a good electrical conductor?

Peat
Charcoal
Graphite
Diamond

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Physics
Electricity is transmitted over long distances

It is cheaper
It is fast
It is safer
There is less wastage of energy

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Physics
What type of lens is used in a magnifying glass

None of these
Convex
Plano-concave
Concave

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Physics
In which of the following cases, kinetic energy is being used in performing work ?

Paddling the bicycle to cover a distance
Wind mill grinding wheat grain
Driving a car to cover a distance
Rowing a boat in the lake

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Physics
Beta rays emitted by a radioactive material are

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

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Physics
For accurate scientific work, temperatures are often measured by

Thermoelectric thermometers
Platinum resistance thermometers
Mercury thermometers
Alcohol thermometers

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