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Question

Assertion :When two long parallel wires, hanging freely are connected in series to a battery, they come closer to each other. Reason: Wires carrying current in opposite direction repel each other.

A
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
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B
Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
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C
Assertion is correct but Reason is incorrect.
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D
Assertion is incorrect but Reason is correct.
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Solution

The correct option is D Assertion is incorrect but Reason is correct.--As the current in the two parallel wires have currents travelling in opposite directions, the magnetic fields generated by those currents between the wires will both point in the same direction. These wires would repel each other.---Assertion is incorrect.--If two current carrying wires are parallel to each other, their respective magnetic fields either attract or repel each other. Two parallel wires have currents traveling in opposite directions, the magnetic fields generated by those currents between the wires will both point in the same direction. Thus, wires would repel each other.-----Reason is correct.

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