Question

an electric lamp of resistance is 20 ohm and a conductor of 4 ohm resistance is connected in series to a 6 volt battery calculate the total resistance calculate the current through the circuit calculate the potential difference across the electric lamp and conductor

Answer 1

A.    total resistance of  circuit = 20Ω + 4Ω =24 Ω

B.   current through the circuit = current through bulb = current through the conductor

current through circuit = Voltage applied/ the voltage of  battery

current through circuit = (6/24) amp  

current through circuit =0.25 amp

 C.  potential difference across the electric lamp and the conductor.

potential difference across electric lamp = 0.25 ×20 = 5 volt

potential difference across conductor = 0.25 × 4 = 1volt