Question

In an $L-C-R$ circuit the value of $X_L,X_C$ and $R$ are 300 $\Omega$, 200 $\Omega$ and 100 $\Omega$ respectively.The total impedance of the circuit will be

• A. 600 $\Omega$
• B. 200 $\Omega$
• C. 141 $\Omega$
• D. 310 $\Omega$

Answer 1

Answer: (C)

141 $\Omega$

Total impedance $=R+j(X_L-X_C)$

$=100+j100$

$=100\sqrt{2}\measuredangle 45$

$=141\measuredangle 45$