Physics · Electrical Measurements

The operational principle of an AC potentiometer is based on:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The electrodynamic force between two current-carrying coils
2The generation of a counter EMF using a standard reference capacitor
3The comparison of power levels between a known and an unknown AC source
4The compensation of an unknown AC voltage by a variable, known AC voltage of the same frequency and phase✓

Correct answer

The compensation of an unknown AC voltage by a variable, known AC voltage of the same frequency and phase

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