Year 8 Electricity

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Year 8 Electricity and Magnetism Learning Objectives

Pupils should know:

1.         that current is measured using an Ammeter.

2.         how to connect up and use an Ammeter.

3.         that in a series circuit, the current is the same all the way round the circuit.

4.         that in a parallel circuit, the current is shared but not lost or used up.

5.         that the current in a series circuit depends on the number and type of components used.

6.         that voltage is a measure of the amount of energy or push given to the electrons.

7.         the effect of voltage on both current and bulb brightness.

8.         that objects made of Iron, Nickel and Cobalt are magnetic and can be used to make magnets.

9.         that t here are two types of magnet: (a) permanent (b) non-permanent.

10.       that magnets can be found in nature or man-made by stroking them with another magnet or by using a direct electric current.

11.       that magnets can be destroyed by hammering them, heating them to red heat or by using an alternating electric current.

12.       that magnets are strongest at their poles (ends).

13.       that the force of a magnet gets stronger as you get closer to it.

14.       that a material is made into a magnet when its dipoles point in the same direction.

15.       that like poles repel and unlike poles attract.

16.       the eight points of the compass.

17.        that the compass uses magnets to tell direction.

18.        that the force of magnets can pass through some materials.

19.        that the region in which a magnet has an effect is called its Magnetic Field.

20.        that a magnet is surrounded by lines of force.  The closer the lines of force, the stronger the effect of the force.

21.        some uses of permanent magnets, e.g. Fridge doors, cupboards.

22.        that a current flowing in a wire produces a magnetic field – this phenomenon is utilised in electromagnets.

23.        that the magnetic field around a straight wire is represented as a series of concentric circles.

24.        that a coil of wire is called a solenoid and produces a similar magnetic field to that of a bar magnet.

25.        some uses of electromagnets such as electric bells, a relay, a scrap yard crane and a door lock.

26.        that an electromagnet can be made stronger by adding a core, more coils or more current.

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