Question

Define a solenoid compare the magnetic field produced by a solenoid which that of bar magnet

Answer 1

A Solenoid is defined as a coil consisting of a large number of circular turns of insulated copper wire . These turns are wrapped closely to form a cylinder .

Answer 2

Explanation:

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