Physics
A current carrying conductor is associated with

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

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Physics
Rainbows are produced when sunlight :

Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
None of the given statements is correct.

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Physics
Skating on ice is possible because

Ice is cold
The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
The pressure on the ice due to skate raises its melting point
The surface of ice is smooth

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