A current in a solenoid coil creates a magnetic field inside that coil.The field strength is directly proportional to:
A)the coil area.
B)the current.
C)Both A and B are valid choices.
D)None of the above choices are valid.

Question

Quizplus · Accepted Answer

The strength of the magnetic field inside a solenoid coil is directly proportional to the current flowing through the coil. This is governed by Ampere's law, which shows that the magnetic field produced by a current-carrying wire is directly proportional to the current flowing through it. The area of the coil does not affect the magnetic field strength.

A Current in a Solenoid Coil Creates a Magnetic Field