1. A current of 10A flows in a circuit with a 45 degree angle of lag when the applied voltage is 100V.Find the resistance, reactance and impedance of the circuit.

2. A coil having a resistance of 15 ohms and an inductance of 0.2H is connected in series with another coil having resistance of 25 ohms and an inductance of 0.04H to a 230V,50Hz supply. Determine the voltage across each coil, the power factor of the circuit as a whole.

3. Explain the working principle of transformer with neat diagram.

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