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Magnetic Field Due to a Circular Arc at the Centre

If we double ...

Question

If we double the radius of a current carrying circular arc keeping the current unchanged, the magnetic field at its center will be .

A

halved

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B

quartered

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C

unchanged

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Solution

The correct option is A halved
Since magnetic field due to current carrying circular arc is inversely proportional to radius of that arc, magnetic field will be halved in this case.

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