How many electrons are flowing per second past a point in a circuit in which there is a current of 5 amp ?

Draw a circuit diagram to show how 3 bulbs can be lit from a battery so that 2 bulbs are controlled by the same switch while the third bulb has its own switch.

An electric heater is connected to the 230 V mains supply. A current of 8A flows through the heater.

(a) How much charge flows around the circuit each second?

(b) How much energy is transferred to the heater each second?

Name the law which relates the current in a conductor to the potential difference across its ends.

Name the unit of electrical resistance and give its symbol.