An EMF source of 8.0 V is connected to a purely light bulb. An electric current of 2.0 flows through it. Calculate the resistance offered by the electrical appliance.
AN EMF SOURCE OF A 8.0 V IS CONNECTED TO THE 2.0 FLOWS so if you calculate by a = 2.0 u will get 4.20 because an electric current flows through the 4.20
