The following series L-C-R circuit, when driven by an e.m.f. source of angular frequency 70 kilo-radians per second, the circuit effectively behaves like

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series R-L circuit

series R-C circuit

series L-C circuit with R=0

purely resistive circuit

answer is C.

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Detailed Solution

$\begin{array}{l} X_{L} = L ω = 100 \times 10^{- 6} \times 70 \times 10^{3} = 7 Ω \\ X_{c} = \frac{1}{c ω} = \frac{1}{10^{- 6} \times 70 \times 10^{3}} = \frac{100}{7} = 14.28 \end{array}$

AS X_c is more than X_Lit behaves as a CR circuit.

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