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  • A series R-C circuit is connected to AC Voltage source. Consider two cases: (A) when is without a dielectric medium and <img

A series R-C circuit is connected to AC Voltage source. Consider two cases: (A) when C is without a dielectric medium and (B) when C is filled with dielectric of constant 4 . The current I_R through the resistor and voltage V_c across the capacitor are compared in the two cases. Which of the following is/are true?

Option: 1

I_R^A>I_R^B


Option: 2

I_R^A<I_R^B


Option: 3

V_C^A>V_C^B


Option: 4

V_c^A<V_C^B


Answers (1)

best_answer

Z=\sqrt{R^2+X_c^2}

=\sqrt{(R)^2+\left(\frac{1}{\omega C}\right)^2}

In case (b) capacitance (c) will be more. Therefore, impedance Z will be less. Hence current will be more.

Posted by

Gautam harsolia

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