Question

field intensity at centre of coil is proportional to​

Answer 1

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At the center of a current carrying coil, the magnetic field intensity is directly proportional to the current and inversely proportional to the radius of the coil. 

Answer 2

Answer:

field intensity at centre of coil is proportional to radius of the coil

Explanation:

At the center of a current carrying coil, the magnetic field intensity is directly proportional to the current and inversely proportional to the radius of the coil. So, if the current is doubled and radius is halved, then the value of B increases by 4 times the initial value.

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