Episode 410: Preparation for Electromagnetism Topic *suitable for home teaching*

This topic, from the Institute of Physics, develops a formal description of magnetic fields before moving on to electromagnetic forces and induction. The learning episodes follow a fairly standard approach that is similar to the order in which the topics appear in most exam specifications. The three main electrical...

Episode 411: Describing Magnetic Fields

Produced by the Institute of Physics, this learning episode uses demonstrations, experiments and questions to help students learn about electromagnetic fields. These consider their strength and direction.

The activities include:
• demonstrating the field around a permanent magnet
• field...

Episode 412: Force on a Conductor in a Magnetic Field

In this learning episode, from the Institute of Physics, students look at how a magnetic field can be quantified by measuring the force on a conductor. It illustrates how Flemming's left hand rule can be used to find the direction of the force. The activities include: 

• investigating the relationship...

Episode 413: The Force on a Moving Charge

This learning episode, from the Institute of Physics, help students extend the idea of a magnetic force on a current to consider moving charges.

A range of activities are suggested and these include:
• demonstrating the deviation of an electron beam
• investigating the relationship between...

Episode 414: Electromagnetic Induction

In these activities, from the Institute of Physics, students investigate electromagnetic induction. The learning episode develops a picture of induction as the cutting of lines of flux by a conductor, which leads to an induced electromotive force (emf) or current. The activities in this learning episode include:...

Episode 415: Electric Motors

Some common electromagnetic machines include motors, generators and transformers. In this learning episode, from the Institute of Physics, all three are described. Students discuss torque, back electromotive force (emf) and power. The activities include looking at:

• a model motor
• motor torque...

Episode 416: Generators and Transformers

Produced by the Institute of Physics, these discussions and demonstrations show that in a generator, motion of a conductor in a magnetic field induces an electromotive force (emf). In a transformer, it is the changing field that induces an emf in a fixed conductor.

The activities in this learning episode...

Episode 700: Preparation for Astronomy Topic

From the Institute of Physics, these learning episodes act as an introduction to cosmology and ideas about the history of the Universe. Most students should have heard of the Big Bang and expanding Universe. This topic makes it all plausible and looks at the wave speed formula, diffraction by a grating and the...

Episode 701: Observing Stars

In this learning episode, from the Institute of Physics, students see that what we know about the Universe comes from observations which rely on the radiation and particles that reach us on Earth. Students discuss astronomical observations including spectra and the information they can carry.

The activities...

Episode 702: Red Shift

Produced by the Institute of Physics, these activities demonstrate the Doppler effect.

Using sound and microwaves, the activities illustrate how changes in wavelength of spectral lines allow us to determine the motion of astronomical objects relative to ourselves.

The activities include:
*...