Magnetic Effects Of Current Question 36

Question: The magnetic field B with in the solenoid having n turns per metre length and carrying a current of i ampere is given by [MP PET 1993]

Options:

A) $ \frac{{\mu_{0}}ni}{e} $

B) $ {\mu_{0}}ni $

C) $ 4\pi {\mu_{0}}ni $

D) ni

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Answer:

Correct Answer: B

Solution:

Magnetic field inside the solenoid $ B_{in}={\mu_{0}}ni $