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

• A. $\frac { \mu _ { 0 } n i } { e }$
• B. $\mu _ { 0 } n i$
• C. $4 \pi \mu _ { 0 } n i$
• D. ni

Answer 1

Answer: (B)

$\mu _ { 0 } n i$

Answer 2

Magnetic field inside the solenoid $B _ { i n } = \mu _ { 0 } n i$