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Lenz's Law

Two coils car...

Question

Two coils carrying current in opposite direction are placed co-axially with centres at some finite separation. If they are brought close to each other then current flowing in them should

A

decrease

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B

increase

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C

remain same

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D

become zero

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Solution

The correct option is C increase
As shown in figure,
according to right hand rule, the direction of magnetic field is opposite in both the wires.
When brought closer induced effects should produce repulsion. So currents should increase, so that pole strength increases. Hence repulsion increases

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