AP EAMCET · PHYSICS · Alternating Current
The following series \(L-C-R\) circuit, when driven by an emf source of angular frequency 70 kilo-radians per second, the circuit effectively behaves like
- A purely resistive circuit
- B series R-L circuit
- C series R-C circuit
- D series L-C circuit with R = 0
Answer & Solution
Correct Answer
(B) series R-L circuit
Step-by-step Solution
Detailed explanation
Impedance, \(Z=\sqrt{\left(X_L \sim X_C\right)^2+R^2}\) or \(\quad Z=\sqrt{\left(\omega L \sim \frac{1}{\omega C}\right)^2+R^2}\) Inductive reactance \(\begin{aligned} X_L & =\omega L=70 \times 10^3 \times 100 \times 10^{-6} \\ & =7 \Omega \end{aligned}\) Capacitance reactance…
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