A constant current is sent through a helical coil made of flexible wire.The coil:
A)tends to get shorter
B)tends to get longer
C)tends to rotate about its axis
D)produces zero magnetic field at its center
E)none of the above

Question

Quizplus · Accepted Answer

When a constant current is sent through a helical coil, the coil tends to get shorter due to the magnetic field created by the current. This field exerts a force on different parts of the coil, pulling the turns of the coil closer together.

A Constant Current Is Sent Through a Helical Coil Made