Electricity and Magnetism

When an electric current passes through a long, hollow coil of wire there will be a strong magnetic field inside the coil and...

Teaching Guidance 14-16

Here you can show that there are such things as compensated circuits: that is, two circuits where the character of the...

Classroom Activity 14-16

In this activity the power input to the wind stream driving a wind turbine is compared with the power delivered to an external...

Classroom Activity 14-16

This is an interactive teacher demonstration that can be used to explore and to get students talking about various aspects of...

Classroom Activity 14-16

Use this set-up to introduce the motor effect: a motor's spinning comes about from the interaction between the current in a...

Classroom Activity 14-16

The energy shifted every second in this circuit depends on both the current and the potential difference. In this simple...

Physics Narrative 14-16

Batteries are just about everywhere. Expensive, portable power is something that we are prepared to pay for. Mobile phones...

Physics Narrative 14-16

Controlling the rate at which energy is shifting (the power) has been, and remains, a central concern of technology. Directing...

Physics Narrative 14-16

Even up until the end of the First World War, electric lighting was only enjoyed by rich householders. The advantages over...

Physics Narrative 14-16

We have all seen this slogan, but does it make a difference? And in terms of the science, surely it's those using filament...

Physics Narrative 14-16

Good room heaters warm the particles in a room, so they switch pretty much all of the power from the electrical pathway to a...

Physics Narrative 14-16

Controlling motion by switching from an electrical pathway to a mechanical pathway happens everywhere. Try counting the...

Physics Narrative 14-16