A DC motor works as follows: A constant voltage source drives a current through

Question

A DC motor works as follows: A constant voltage source drives a current through a coil that surrounds a magnet. The magnet exerts a torque on the coil, causing the coil to turn. We turn off the current when the torque would reverse direction (or, even better, we reverse the current every half turn, so the torque is always rotating the loop in the same direction.) If the motor stalls (stops turning) the current will increase, potentially causing the motor to burn out. Explain this increase in the current.

Explanation / Answer

This is because of back emf

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