What is current?

What is required for current to flow around a complete circuit?

Describe the current in a series circuit?

What is another name for potential difference?

What is the unit of current?

What is the unit of potential difference?

What is resistance?

What is the unit of resistance?

How does the level of resistance affect the current in a circuit?

What is charge?

What is charge measured in?

How do you calculate charge?

A battery charger passes a current of 2A through a cell for 2.5 hours. How much charge is transferred to the cell?

How could I get more charge to pass through a circuit?

What is the formula which links potential difference and current?

A 4Ω resistor has a potential difference of 6V across it. What is the current flowing through the resistor?

Name three factors that affect resistance in a circuit.

Describe the resistance of an ohmic conductor.

Describe the relation between the current and potential difference of an ohmic conductor.

Describe what happens when an electrical charge runs through a filament lamp.

Describe the resistance of a diode.

Explain why diodes are used in phone chargers.

Draw the I-V characteristic graph for an ohmic conductor.

Draw the I-V Characteristic graph for a filament lamp.

Draw the I-V characteristic graph of a diode.

What does LDR stand for?

Describe how a LDR works.

Give 2 examples as to the applications of LDRs.

Describe how a thermistor works.

Describe how a series circuit would be connected.

Describe the potential difference in series circuits.

Describe the current in a series circuit.

Describe the resistance of two components in a series circuit.

In a circuit there are two cells each with a voltage of 1.1 volts. What is the total potential difference of the circuit?

2 12 V cells are connected in series with a 3Ω resistor, a 2Ω resistor and a 7Ω resistor. Calculate the current passing through the circuit. [5 marks]

Describe the potential difference in a parallel circuit.

Describe the current in a parallel circuit.

What happens if you add a resistor in a parallel circuit?

Explain what happens to the current and resistance in a circuit with a cell and a resistor, when another resistor is added in parallel?
[2 Marks]

Draw a circuit diagram where 2 bulbs are connected to a battery in parallel. Both lamps should be able to switch on and off without affecting anything else. [3 marks]

Draw a graph showing how the number of resistors connected in a circuit changes the resistance in series.

Draw a graph showing how the number of resistors connected in a circuit changes the resistance in parallel.

Draw a diagram of a single circuit that could be used to investigate the effect of adding resistors in parallel. Your circuit should include switches. [1 mark]

Name the two types of electricity supply.

Describe the current in the UK mains supply.

Compare AC and DC current.

Describe the structure of a three core cable.

Name the three wires in a standard UK cable.

What colour are the three wires in a standard cable?

Describe the purpose of the live wire.

Describe the purpose of the neutral wire.

Describe the purpose of the earth wire.

Explain what would happen if you were to touch the live wire.

What could happen if there was a connection between the live an neutral wires?

State the potential difference of:
The live wire, The neutral wire, The earth wire.
[3 marks]

Write the equation for energy transferred.

A 600w microwave is used for 5 minutes. How long in minutes would it take a 750w microwave to do the same amount of work?

A circuit is made up of just a 10 Ω resistor. Explain why there is no current in the circuit.
[1 mark]

A current of 3A flows through a 6Ω resistor. Calculate the potential difference of the circuit. [2 marks]