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प्रश्न
When is the impedance \[Z=\sqrt{R^2+(X_C-X_L)^2}\] minimum?
पर्याय
\[X_C-X_L=0\]
\[X_C-X_L=R\]
\[X_C+X_L=R\]
\[X_C=X_L+R\]
MCQ
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उत्तर
The squared reactance difference cannot be negative, so it contributes least when it is zero. This gives the resonance condition \[X_C=X_L\].
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