Question

What is solenoid? What are the factors that affect strength of solenoid.​

Answer 1

Answer:

Materials, size and duty of the solenoid all affect the operation. A solenoid, as you know, is a coil with an element which moves as a result of power being applied and removed. A simple switch. Clearly the more windings you have for set conditions of voltage will generate a greater field strength.

Answer 2

Answer:

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