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Question:

In series LCR circuit, the phase difference between applied voltage and current is

0°

Positive when XL>XC

Positive when XC>XL

90°

Solution:

Let the phase difference between applied voltage and current in series LCR circuit be φ.Thus, tanφ = i(XL−XC)/iR = XL−XCRThus, it is positive for XL>XC.