Question

The expression for magnetic induction inside a solenoid of length L carrying a current I and having N number of turns is

• A.
• B. $\mu _ { 0 } N I$
• C. $\frac { \mu _ { 0 } } { 4 \pi } N L I$
• D. $\mu _ { 0 } \frac { N } { L } I$

Answer 1

Answer: (D)

$\mu _ { 0 } \frac { N } { L } I$

Answer 2

$B = \mu _ { 0 } n i = \mu _ { 0 } \frac { N } { L } i$