Question

What is a solenoid ? Draw the mgnetic lines of force around the carrying solenoid. Write the use of solenoid?

Answer 1

Answer:

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Answer 2

Answer:

$\mathtt \pink{ \xcancel{d B = \frac { M _ { 0 } n d x I a ^ { 2 } } { 2 [ ( r - x ) ^ { 2 } + a ^ { 2 } ] ^ { 3 / 2 } }}}$

Explanation:

$\mathtt \pink{ \xcancel{d B = \frac { M _ { 0 } n d x I a ^ { 2 } } { 2 [ ( r - x ) ^ { 2 } + a ^ { 2 } ] ^ { 3 / 2 } }}}$