Answer to Question #132283 in Electric Circuits for Temi

Question

What will happen to the current with 5 VRMS and 0.22F connected in series as frequency increases?

Answer 1

Explanations & Calculations

• Capacitors, like resistors show some resistance—normally called as the impedance (Z) of the capacitance (C)— when used in ac circuits & it's given by, $\small Z = \large \frac{1}{C\omega}$
• Then,

$\qquad\qquad \begin{aligned} \small Z &= \small \frac{1}{C\times 2\pi f} \end{aligned}$ where $\small f$ is the frequency of the supply implies that as the frequency increases the value of Z decreases.

• According to the generalized Ohm's law, $\small V = i Z \to i=\large \frac{V}{Z}$ , $\small i$ is expected to increase as the applied voltage remains constant.

• For this sum C = 2.2F & V_rms= 5V