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In an a.c. circuit containing L, C, R is series, the ratio of true power to apparent power is (Z = impedance of the circuit, R = resistance, ϕ = phase difference between the r.m.s. values of current

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Question

In an a.c. circuit containing L, C, R is series, the ratio of true power to apparent power is (Z = impedance of the circuit, R = resistance, `phi` = phase difference between the r.m.s. values of current and e.m.f.) ____________.

Options

  • `"R"/"Z"`

  • `"Z"/"R"`

  • `cot phi`

  • RZ

MCQ
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Solution

In an a.c. circuit containing L, C, R is series, the ratio of true power to apparent power is `"R"/"Z"`.

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Types of AC Circuits
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