What is a phasor diagram ? Draw a phasor diagram when a pure resistor is conneted acorss an a.c. supply and show that current and voltage are in the same phase.

When one inductor coil is connected to a 20 V DC battery then it draws a steady - state current of 10 A . This inductor coil is connected across AC supply of rms voltage 10 V and one capacitor in series . It if found that current and vlotage are in same phase . What will be the rms current in the circuit ?

A capacitor, a 101.5 mH inductor and a 5 ohm resistor are connected in series with a 50 Hz a.c. source. If current and voltage in the circuit are in phase, what is the capacity of the condenser ?

a) Derive the expression for the current flowing in an ideal capacitor and its reactance when connected to an ac source of voltage V=V_0sin omegat b) Draw its phasor diagram. c) If resistance is added in series to capacitor what changes will occur in the current flowing in the circuit and phase angle between voltage and current.

What will be the instantaneous voltage for an a.c. supply of 230 V and 50 Hz?