A constant current is sent through a helical coil. 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

The coil tends to get shorter due to the magnetic forces between the turns of the coil, which attract each other, causing the coil to compress.

A Constant Current Is Sent Through a Helical Coil