Question

What do you mean by a solenoid?

Answer 1

Hint: In such types of questions the basic concept of solenoid will be used to answer the question.

Complete step-by-step solution -
A solenoid is a long wire wound in the form of a helix where the neighboring turns are closely spaced. So each turn is regarded as a circular loop. The net magnetic field is the vector sum of the fields due to all the turns . Enamelled wires are used for winding so that turns are insulated from each other. Generally , the length of the solenoid is large as compared to the transverse dimensions.
For example : If the solenoid has circular turns, the length is large as compared to its radius. If it has rectangular turns, the length should be as large as compared to its edges.
A coil of wire usually in cylindrical form that when carrying a current acts like a magnet so that a movable core is drawn into the coil when a current flows and that is used especially as a switch or control for a mechanical device .
For Example: If the brake light switch is out of adjustment, pressing the pedal will not release the shift- lock solenoid on the shifter mechanism.

Note: A solenoid is a coil of insulated or enameled wire wound on a rod-shaped form made of solid iron, Solid steel, or powdered iron. In a solenoid, the core material is ferromagnetic , meaning that it concentrates magnetic lines of flux.