Which of the following correctly describes a solenoid? a) the magnetic field around a solenoid is unipolar. b) the field around a solenoid is termed a bar magnet. c) a solenoid is created by winding current carrying wire into a coil. d) increasing the current in the wires will reduce the magnetic field outside of the solenoid.

Answer;

C) A solenoid is created by winding current carrying wire into a coil.

Explanation;

-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.

-Solenoids have a wide range of applications, for instance they are used as electromagnets, as inductors in electronic circuits, and as miniature wireless receiving antennas.

b. a lightning bug, plug of grass, and a worm