A battery of e.m.f. 7.5 V is connected in series with a variable resistor and a 30 Ω resistor. The battery is made using 1.5 V cells.
Draw a circuit diagram that shows all the 1.5 V cells connected to produce an e.m.f. of 7.5 V, the variable resistor and the 30 Ω resistor.
Draw Accuracy is being marked. Use the figure and be precise about position and labels.
Your answer
Suggested time: 5 min