What type of voltage is applied to and tapped off of a voltage regulator?

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Multiple Choice

What type of voltage is applied to and tapped off of a voltage regulator?

Explanation:
The input to a voltage regulator is the primary voltage. Inside many regulators (especially transformer-based types), the regulator is wired so the incoming line voltage energizes the primary winding, and the desired, controlled output is taken from the secondary winding as the regulated voltage to feed the load. So the voltage applied to the regulator is the primary voltage, while the voltage you tap off on the output side is the regulated (secondary) voltage. Ground voltage isn’t what’s applied to power the regulator.

The input to a voltage regulator is the primary voltage. Inside many regulators (especially transformer-based types), the regulator is wired so the incoming line voltage energizes the primary winding, and the desired, controlled output is taken from the secondary winding as the regulated voltage to feed the load. So the voltage applied to the regulator is the primary voltage, while the voltage you tap off on the output side is the regulated (secondary) voltage. Ground voltage isn’t what’s applied to power the regulator.

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