A motor sometimes burns out when its load is suddenly increased because the resulting sudden decrease in its rotational frequency causes
A)an increased bACk EMF and an increased current flow.
B)a decreased bACk EMF and a decreased current flow.
C)a decreased bACk EMF and zero current flow.
D)an increased bACk EMF and a decreased current flow.
E)a decreased bACk EMF and an increased current flow.

Question

Quizplus · Accepted Answer

When the load on a motor is suddenly increased, its rotational frequency decreases, leading to a decrease in back EMF. This decrease in back EMF allows more current to flow through the motor, potentially causing it to burn out if the current exceeds the motor's design limits.

A Motor Sometimes Burns Out When Its Load Is Suddenly