(a) Draw a schematic diagram of a circuit consisting of a $24 \mathrm{V}$ battery, a $10 \mathrm{\Omega }$ resistor, a $5 \mathrm{\Omega }$ resistor and a $1 \mathrm{\Omega }$ resistor, an ammeter and a plug key, all connected in series.

(b) Calculate the ammeter reading in this circuit.

Draw a schematic diagram of a circuit consisting of a battery of $12 \mathrm{V}$, three resistors of $5 \mathrm{\Omega }$, $10 \mathrm{\Omega }$ and $20 \mathrm{\Omega }$ connected in parallel, an ammeter to measure the total current through the circuit, voltmeter to measure the potential difference across the combination of resistors.

What is the potential difference across each of the resistors in the circuit shown in the figure?

A conductor of $4 \mathrm{\Omega }$ and an electric lamp of resistance $12 \mathrm{\Omega }$ are connected in series to a $12 \mathrm{V}$ battery. Calculate total resistance of the circuit.

(a) Draw a schematic diagram of a circuit consisting of a battery of three cells of $4 \mathrm{V}$ each, a $4 \mathrm{\Omega }$ resistor, a $6 \mathrm{\Omega }$ resistor and a $15 \mathrm{\Omega }$ resistor, and a plug key, all connected in series.

(b) Redraw the circuit putting an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the $15 \mathrm{\Omega }$ resistor. What would be the readings in the ammeter and the voltmeter?