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Physics

Physics
Alternating current is converted into direct current by a

Oscillator
Transformer
Rectifier
Dynamo

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Physics
Magnetic keepers are pieces of

Cobalt
Soft iron
Nickel
Steel

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Physics
Water from soil enters into the root hairs owing to :

Atmospheric pressure
Root pressure
Capillary pressure
Osmotic pressure

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Physics
Which of the metals has the maximum thermal conductivity?

Aluminium
Copper
Silver
Iron

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Physics
Which conservation principle is applicable in the case of the motion of a rocket?

Conservation of mass
Conservation of charge
Conservation of energy
Conservation of momentum

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Physics
A permanent magnet can affect

None of these
Electromagnets
Magnets
Both A & B

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