In pulse width modulation, motor speed is controlled by monitoring a compact break on the motor shaft.

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Multiple Choice

In pulse width modulation, motor speed is controlled by monitoring a compact break on the motor shaft.

Explanation:
Pulse width modulation controls motor speed by varying the average voltage delivered to the motor through the duty cycle of the switching waveform. Speed is typically regulated using a feedback signal from a speed sensor (like an encoder or tachometer) or a sensorless method, adjusting the duty cycle to reach the desired speed. A brake on the motor shaft is a mechanical device used to hold or resist motion, and it does not provide the speed feedback or control signal needed for PWM-based speed regulation. Hence, monitoring a brake is not how PWM speed control is achieved, so the statement is false.

Pulse width modulation controls motor speed by varying the average voltage delivered to the motor through the duty cycle of the switching waveform. Speed is typically regulated using a feedback signal from a speed sensor (like an encoder or tachometer) or a sensorless method, adjusting the duty cycle to reach the desired speed. A brake on the motor shaft is a mechanical device used to hold or resist motion, and it does not provide the speed feedback or control signal needed for PWM-based speed regulation. Hence, monitoring a brake is not how PWM speed control is achieved, so the statement is false.

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