Calculate the potential difference across the 8 Ω resistor.

Calculate the voltage over resistor X and its resistance.

A circuit was set up as shown in the diagram. Each cell provides a potential difference of 1.5 volts. What is the total potential difference provided by the four cells in the circuit?

What potential difference is dropped over the 60 Ω resistor?

What is the current reading on the ammeter A?

What is the resistance of the bulb?

Calculate the total resistance in this series circuit.

Calculate the potential difference in the circuit.

Use the equation that relates potential difference to resistance and current to calculate the potential difference across the lamp when a current of 0.8 A flows through the lamp.

When all four heating elements are switched on at full power, the hob draws a current of 36 A from the 230 V mains electricity supply. Calculate the resistance of one heating element when the hob is switched on at full power. Give your answer to 2 significant figures.