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MHT CET 2026 (16 Apr, Shift 2) · Ampere's Law, Cylinders, Solenoid & Toroid

Ampere's Law, Cylinders, Solenoid & Toroid question from MHT CET 2026 (16 Apr, Shift 2)

Q11MHT CET 2026 · 16 APR · SHIFT 2Easy

Ampere's Law, Cylinders, Solenoid & Toroid

The magnetic field intensity (H) at the centre of a long solenoid having 'n' turns per unit length and carrying a current I, when no material is kept in it is ( $\mu_0$ = permeability of free space)

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Answer: (b)

Inside a long solenoid $B = \mu_0 n I$ and $H = \dfrac{B}{\mu_0}$ .
$H = nI$ .
So the answer is (b) $nI$ .

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