Calculate the impedance and power factor of Coil 1. Given V = 200 V, I1 = 15 A, P1 = 2800 W.

Step 1: Determine the parameters of Coil 1.
Given:
Supply voltage $V = 200 \text{ V}$
Current $I_1 = 15 \text{ A}$
Power dissipated $P_1 = 2800 \text{ W}$

The power dissipated in an AC circuit is given by $P = V I \cos \phi$.
For Coil 1:

$$P_1 = V I_1 \cos \phi_1$$ $$2800 \text{ W} = 200 \text{ V} \times 15 \text{ A} \times \cos \phi_1$$ $$$$