In series combination of R, L and C with an A.C. source at resonance, if R = 20 ohm, then impedence Z of the combination is
A. 20 ohm
B. zero
C. 10 ohm
D. 400 ohm
Answer:A
In series combination of R, L and C with an A.C. source at resonance, if R = 20 ohm, then impedence Z of the combination is
A. 20 ohm B. zero C. 10 ohm D. 400 ohm