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When are the voltage and current in LCR-series ac circuit in phase?

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in Physics – Class 12 by (135k points)
When are the voltage and current in LCR-series ac circuit in phase?

(a) XL = XC

(b) XL > XC

(c) XL < XC

(d) Indeterminant

The question was posed to me in homework.

This interesting question is from AC Voltage Applied to a Series LCR Circuit in chapter Alternating Current of Physics – Class 12

1 Answer

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Best answer
Correct choice is (a) XL = XC

The best explanation: When XL = XC, the resultant vector for net reactance will be zero and the value of θ will also be zero. Hence, when current and voltage will be in the same phase, it is called as a purely resistive circuit and in this case the peak current will be maximum.

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