Mains electricity

Science

Electrical resistance

Thickness of a wire

Length of a wire

Making parallel circuits

Voltage in parallel circuits

Loops of a parallel circuit

Measuring current in a parallel circuit

Comparing series and parallel circuits

about the properties of electric fields, moving electric charge, and how to analyse series and parallel electrical circuits.

In the Series circuits unit, pupils learnt about static electricity (electric charge), setting up series circuits using circuit diagrams, finding and replacing faulty components, and the rules for electric current and voltage in series circuits.

This unit covers electrical circuits, compares appliance power ratings, and understands domestic fuel use and costs. It explores electric current, potential difference, resistance, and the differences between conductors and insulators, focusing on calculations and applications in circuits.

Resistance and parallel circuits

Which of the following is the unit of power?

Which of the following devices or appliances has the greatest power rating?

Which of the following values is equal to 0.1 kilowatts?

What is the cost of using a 1000 W heater for 30 min, if 1 kWh costs £0.30?

Which of the following types of circuit is used for car headlamps so that if one light stops working, the other stays lit?

Voltage is measured in parallel, current is measured in series.

Both voltage and current are measured in parallel.

Voltage is measured in series, current is measured in parallel.

Both voltage and current are measured in series.

Which of the following statements is correct?

The voltmeter and the ammeter both have a high current passing through them.

The voltmeter and the ammeter both have a low current passing through them.

The voltmeter has a high current and the ammeter has a very low current passing.

The ammeter has a high current and the voltmeter has a very low current passing.

Which of the following statements about a circuit where a high current flows through a bulb and the voltage and current are correctly measured is correct?

In the circuit shown, what is the voltage across the electric cell if the voltage across the 8 $$\Omega$$ resistor is 2.0 V and the voltage across the 4 $$\Omega$$ resistor is 2.0 V?

In the circuit shown, what will the ammeter read if the current in the resistor is 0.35 A and the current in the lamp is 0.25 A?

A mix of different sources, depending on weather conditions and demand.

Where does our household electricity come from?

Introduction

What will you need for this lesson?

Are you ready to learn?

Equipment

Worksheet