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JEE Main 2002 Physics question

PhysicsMoving Charges and MagnetismJEE Main 2002

If in a circular coil of radius , current I is flowing and in another coil of radius a current is flowing, then the ratio of the magnetic fields and , produced by them will be

Answer: (1)

Solution

The field at the centre of a circular coil is . and $ = =

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Question ID VK-037887