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Mechanism of Formation of P-N Junction

Two long wire...

Question

Two long wires each carrying a DC current in the same direction are placed close to each other. Which one of the following statements is correct?

A

The wires will attract each other.

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B

The wires will repel each other.

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C

There will be no force between the wires.

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D

There will be a force between the wires only at the moment when the current is switched ON or OFF.

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Solution

The correct option is A The wires will attract each other.
Two straight wires carrying current in same direction exert an attractive force on each other while those carrying current in opposite direction repel each other.

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