For a series L-C-R a.c.circuit at resonance, the statement which is not true ?

Options

A. Wattless current is zero
B. Power factor is zero
C. Peak energy stored by a capacitor = peak energy stored by an inductor
D. Average power = apparent power

Answer

A, B

Explanation

For a series L-C-R, A.C. circuit at resistance, `omegaL=omegaC` So Z = R. So resultant power factor
cos `delta=R/"|Z|"`
`therefore cos delta=R/R=1`
`therefore delta=0^@`
Thus, power factor is 1 and in the circuit only resistance is effective So loss of power is maximum.