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Alternating Current question bank (Physics)

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Q1.

In a series LCR circuit $R = X_L = 2X_C$. The impedance of the circuit and phase difference between 'V' and 'I' respectively will be

(A)

$\dfrac{R}{2}, \tan^{-1}(0.5)$

(B)

$\dfrac{\sqrt{5}}{2}\ R, \tan^{-1}(0.5)$

(C)

$\dfrac{\sqrt{5}}{2}\ R, \tan^{-1}(0.2)$

(D)

$\dfrac{R}{2}, \tan^{-1}(0.2)$

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Q2.

Which phasor diagram represents LCR circuit at resonance?

(A)

fig.(c)

(B)

fig.(a)

(C)

fig.(d)

(D)

fig.(b)

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