Question

Explain working and construction of a solenoid

Answer 1

The efficiency of a solenoid is a factor of mechanical geometry, electrical configuration and magnetic permeability of core, plunger and housing. ... When the coil is energized by the electric current "i ", a magnetic force is created between plunger and end core, causing the plunger to travel.

Answer 2

Answer:

A solenoid is a mass of insulated copper wires that are arranged in a coil and wrapped really close together to form a cylinder like structure.

A solenoid behaves like bar magnets i.e it behaves like it has a north & south pole.

The magnetic field lines in a solenoid are similar to that of in a bar magnet i.e they originate from the north pole and merge into the solenoid through the south pole.

Also, the magnetic field lines inside the solenoid are parallel to each other i.e the strength of magnetic field lines inside a solenoid is uniform at all points.