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Physics

Physics
A transformer works on the principle of

Mutual induction
Self induction
Inverter
Generator

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Physics
Copper wires are generally used for electrical power transmission instead of iron wire because :

Copper can take higher power than iron
Copper is a better conductor of electricity than iron
Copper is cheaper than iron
Copper is lighter than iron

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Physics
A concave lens always forms

An image type which depends on object characteristics
A real image
A virtual image
An image type which depends on lens curvature

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Physics
Electricity is transmitted over long distances

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

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Physics
Pa(Pascal) is the unit for

Thrust
Frequency
Conductivity
Pressure

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Physics
Which of the following pair is Incorrect?I. Parsec - DistanceII. Barrel - LiquidIII. Light year - Time

Only II
All are correct
Only I and III
Only III

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