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Force on a Current Element

Two long wire...

Question

Two long wires are hanging freely. They are joined first in parallel and then in series and then are connected with a battery. In both cases, which type of force acts between the two wires

A

Attraction force when in parallel and repulsion force when in series

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B

Repulsion force when in parallel and attraction force when in series

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C

Repulsion force in both cases

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D

Attraction force in both cases

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Solution

The correct option is A Attraction force when in parallel and repulsion force when in series
When connected in parallel the current will be in the same direction hence the wires attract each other and when connected in series the current will be in the opposite direction. Hence they repel each other.

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Force on a Current Element

Standard XI Physics

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