Finding Values using Equations

230 V supply, 60 W bulb, 40 W bulb.

To find current of an electrical appliance :-

W/V = 60 W/230 V = 3.83 A

To find resistance of an electrical appliance :-

R = V/A = 230 V/3.83 A = 60.05 Ohm.

We took a 60 Watt bulb and a 40 Watt bulb in a series circuit.

Current is 0.2 A

Voltage drop is - 200 W = 27          input - 240 V

                            60 W = 210         input - 240 V

Current is - 40 W - 0.2 A on a 230 V supply.

                    138 W - 0.6 on a 230 V supply.