Doubling the current, number of turns, the area, and the ambient magnetic field for a coil changes the maximum torque it can experience by what factor?
A) 2
B) 4
C) 8
D) 16
E) 32

Question

Quizplus · Accepted Answer

The maximum torque experienced by a coil is given by the equation:$$	au = N I A B$$where:* N is the number of turns in the coil* I is the current flowing through the coil* A is the area of the coil* B is the ambient magnetic fieldIf we double all of these quantities, then the torque will be increased by a factor of 2^4 = 16.

Doubling the Current, Number of Turns, the Area, and the Ambient