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Physics

Physics
Magnetic keepers are pieces of

Soft iron
Cobalt
Nickel
Steel

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Physics
The waves used in sonography are

Sound waves
Ultrasonic waves
Infra-red waves
Micro waves

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Physics
A current carrying conductor is associated with

An electric field
An electrostatic field
An electro-magnetic field
A magnetic field

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Physics
Frictional force acts in

Upward direction
All the directions
The opposite direction of the motion
The same direction as the motion

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Physics
An atom with more neutrons than protons is called

Element
None of these
Isotope
Compound

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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 cheaper than iron
Copper is lighter than iron
Copper is a better conductor of electricity than iron

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