Question

Define a solinoid.Compare the magnetic field produced by a solenoid with that of a bar magnet

Answer 1

Answer:

a solenoid is a long coil containing a latge numbera of close turns of insulated copper wire.

1. in solenoid the magnetic field is proportional to number of turns
2. magnetic field is also proportional to charge.

it depends on the nature of core material used to make solenoid.

a bar magnet exert magnetic field all around it

sorry to say but know only this much.

Answer 2

Explanation:

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