NEET Physics AC Voltage MCQ Question
What theorem is used to combine the voltages across a resistor and capacitor when they are out of phase in an AC circuit?
Pythagorean theorem
Ohm's law
Kirchhoff's voltage law
Superposition theorem
Correct Answer
Detailed Explanation
The Pythagorean theorem is used because the voltages across the resistor and capacitor are out of phase by ninety degrees, thus they cannot be added directly as ordinary numbers.
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