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.) ____________.

विकल्प

• `"R"/"Z"`

• `"Z"/"R"`

• `cot phi`

• RZ

Answer 1

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