A solenoid 1 . 5 m long and 0 . 4 cm in diameter possesses 10 turns / cm . A current of 5 A flows through it. The magnetic field at the axis inside the solenoid is

Question

A solenoid 1 . 5 m long and 0 . 4 cm in diameter possesses 10 turns / cm . A current of 5 A flows through it. The magnetic field at the axis inside the solenoid is, 2 π × 10 - 3 T, 2 π × 10 - 5 T, 4 π × 10 - 2 T, 4 π × 10 - 3 T

MARKS App · Accepted Answer

Magnetic field at the axis inside the solenoid B = μ 0 ni Here, n = 10 turns cm - 1 = 1000 turns m - 1 , i = 5 A ∴ B = 4 π × 10 - 7 × 1000 × 5 = 2 π × 10 - 3 T

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