Study all of the electricity notes and then give this little quiz a go. You have up to 40minutes to complete it.

Select the most appropriate answers to the words provided below: Potential Difference Resistance Charge Power Work done
Answer the following multiple choice questions
Ohm's law states that the ratio of potential difference to current is always constant across a wire providing what remains constant?
A thermistors resistance changes as the temperature changes. Which of the following shows how temperature and resistance compare
A washing machine is connected to the mains electricity supply using a cable and a three pin plug. The figure here shows a three pin plug: What material do you think the pin would be made out of?
What material do you think the outer casing might be made out of?
The three pin plug contains a fuse. The fuse is connected to one of the wires inside the cable.
Which one of the wires inside the cable is the fuse connected to?
The fuse is a thin wire inside a closed glass tube. The wire acts as a resistor. What affect does a current through a wire have on the wire?
The power of the washing machine varies between 0.7 kW and 2 kW depending on which part of the washing cycle is operating.
Calculate the maximum current drawn from the mains electricity supply by the washing machine.
The mains electricity supply is at a potential difference of 230 V.

The following image shows how the mains electricity cable is connected to the washing machine.
The earth wire is connected to the metal case of the washing machine. If a fault makes the metal case live, the earth wire and fuse inside the plug prevent the mains cable from overheating and causing a fire.
Select from the following sentences the most appropriate reasons why this is.
Select all that apply.

New research has shown that many people underestimate the hazards of using mains electricity.
It is important that people do understand the hazards of using mains electricity.

Suggest why.

The 6 V battery shown in the diagram is made up of a number of identical 1.5 V cells.

Calculate the minimum number of cells needed to make the battery.

The switch in the diagram is shown in the open position. Closing the switch completed the circuit.
Charge flows through the completed circuit and a reading is shown on both the ammeter and the voltmeter.
In 10 seconds, 20 coulombs of charge flows through the circuit.
Calculate the current reading shown on the ammeter.

For 20 coulombs of charge to flow through the resistor R, 100 joules of work must be done.
Calculate the potential difference reading given by the voltmeter.

Figure 1 shows the oscilloscope trace an alternating current (a.c.) electricity supply produces. One vertical division on the oscilloscope screen represents 5 volts.
Calculate the peak potential difference of the electricity supply.
Complete the sentence.
In the UK the frequency of the a.c. mains electricity supply is hertz.
Figure 2 shows how two lamps may be connected in series or in parallel to the 230 volt mains electricity supply. Calculate the potential difference across each lamp when the lamps are connected in series.
The lamps are identical.

Potential difference when in series is:
What is the potential difference across each lamp when the lamps are connected in parallel.