A long solenoid of length L has a mean d...

A long solenoid of length `L` has a mean diameter `D`. It has `n` layers of windings of `N` turns each. If it carries a current `‘i’` the magnetic field at its centre will be

Proportional to D

Inversely proportional to D

Independent of D

Proportional to L

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NTA MOCK TESTS-NTA NEET SET 73-PHYSICS

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