Assignment

1. A circuit containing a resistor of 20 Ω in series with a 100 µF capacitor is connected to a 220 V, 50 Hz supply. Determine the current and its phase with respect to the E.M.F.
2. Construct a series RC circuit with 25 Ω resistor, 1 µF capacitor and an AC power source of 50 V. Vary the frequency of the power source, observe the variation of current through the circuit and plot the graph between frequency vs current.
3. In an RC circuit, 12 Vrms is measured across the resistor and 15 Vrms is measured across the capacitor. What is the value of the RMS source voltage?
4. A resistor and capacitor are in series across a 20 V AC source. Calculate the circuit impedance, Vrms, total current, phase angle, and the voltage across each component.



5. A 25 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an AC source. What is the circuit impedance?