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Q4. A coil having inductance and resistance is connected to a supply of 120 V 50 Hz and draws a current of 2.5 A at a power factor of 0.75. Calculate EACH of the following:

(a) The resistance of the coil;

(b) The inductance of the coil.

(c) A capacitor is now connected in series with the coil and the current rises to 3 A and the power factor is still lagging.

Calculate the value of the capacitor.

(d) Calculate the value of capacitor which would have to be connected in series with the coil to raise the current to 3 A with a leading power factor.