Speed control of a universal motor is attained by

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Speed control of a universal motor is attained by

1. Applying variable voltage by means of silicon-controlled rectifier
2. Connecting rheostat in series
3. Varying field flux with tapped field windings
4. All of these

Correct answer: 4. All of these

Also see:

1. Induction motor MCQs
2. Snchronous motor MCQs
3. Basic Electrical Laws and Theorems
4. Basic Voltage and Current MCQs
5. High Voltage Engineering MCQs