Inside a long ideal solenoid with $n$ turns per unit length carrying current $I$, the magnetic field is:

1. A zero
2. B $\mu_0 n I$ Correct answer
3. C $\mu_0 I/n$
4. D $\mu_0 n I/2$

Solution

Ideal solenoid: uniform axial field $B = \mu_0 n I$.

About this question

Subject: Physics · Chapter: Magnetic Effects of Current · Topic: Ampere's Law

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