When the lights of a car are switched on, an ammeter in series with them reads 7.01 A and a voltmeter connected across them reads 12.0 V (see the figure). When the electric starting motor is turned on, the ammeter reading drops to 5.91 A and the lights dim somewhat. If the internal resistance of the battery is 0.0571 and that of the ammeter is negligible, what are (a) the emf of the battery and (b) the current through the starting motor (in A) when the lights are on?

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.