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From the Institute of Physics, this topic looks at basic electrical ideas, particularly current, potential difference and energy. The topic is split into teaching episodes. These are self-contained activities of varying time periods. The topics in this section include:
From the Institute of Physics, these activities allow students to understand the idea of electric charge and its relationship to a flow of current.
There are a range of activities and these include:
• using an analogy to represent the movement of charge
• defining current and the coulomb...
From the Institute of Physics, these activities present a range of examples involving different types of charge carrier and links the measured current to rates of flow of charge.
The activities consist of a series of demonstrations which could be set up before the lesson. These include:
From the Institute of Physics, this learning episode shows that charge carriers in good conductors usually move very slowly. It illustrates the derivation and use of the equation I = nAvq.
A range of activities include:
• viewing the movement of permanganate ions in an electric field
From the Institute of Physics, in this learning episode, students calculate electrical power and through discussion, review their understanding of:
• potential difference
• electromotive force (emf)
• drift velocity
Students are reminded of the idea that power...
From the Institute of Physics, this learning episode provides a quantitative definition for resistance (R = V / I) which reinforces the qualitative notion that more resistance means less current. It looks at Ohm’s law, describing that this is not the same thing as the definition of resistance.
In these activities, from the Institute of Physics, the concept of electrical power is explored. Students find that the energy transferred by an electrical component depends on the potential difference, current and the time for which it operates.
The activities include:
• demonstrating energy use with a...
From the Institute of Physics, this learning episode links Kirchhoff’s circuit laws to the conservation of charge and energy. Students can verify the laws experimentally and use them to solve simple circuit problems.
This learning episode involves the following activities:
• demonstrating the...
Produced by the Institute of Physics, this learning episode can be used to revises the idea of electromotive force (emf), introduce internal resistance and the consequent energy losses.
The activities include:
• revising ideas about energy in circuits to check and reinforce students’ basic ideas about...
Produced by the Institute of Physics, this learning episode helps students to distinguish alternating from direct currents before revising why alternating current (ac) is so important.
The range of activities include:
• demonstrating the output of a generator
• measuring alternating current with a...