Question

A resistor and a capacitor are in series across a $20V$ ac source. Circuit impedance is $4.33k\Omega$. Current flow in the circuit is

• A. $9.2mA$
  
• B. $92mA$
  
• C. $4.6mA$
  
• D. $460mA$
  

Answer 1

The correct option is C $4.6mA$

Voltage of the source $V=20$ volts

Circuit impedance $Z=4.33k\Omega =4.33\times {10}^3\Omega$

Thus current in the circuit $I=\frac{V}{Z}$

$\therefore$ $I=\frac{20}{4.33\times {10}^3}=4.6\times {10}^{-3}A$

$⟹$ $I=4.6mA$