| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
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When a current flows through a conducting wire a magnetic field is produced around the wire. |
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What happens when a current flows through a conducting wire? Describe how the magnetic effect of a current can be demonstrated.
Use the ‘right hand thumb rule’ to draw the magnetic field pattern of a wire carrying an electric current.
Demonstrate what happens when a foil strip with a current flowing through it is placed in a strong magnetic field. What happens if the direction of the current is reversed?
Try to demonstrate the shape of the magnetic field by placing a wire through a piece of card with iron filings sprinkled near it. Apply a current through the wire. |
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The strength of the magnetic field depends on the current through the wire and the distance from the wire. |
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What does the strength of the magnetic field depends on? |
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Shaping a wire to form a solenoid increases the strength of the magnetic field created by a current through the wire. |
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How does shaping a wire into a solenoid affect strength of the magnetic field? |
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The magnetic field inside a solenoid is strong and uniform. |
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What is the magnetic field like inside a solenoid? |
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The magnetic field around a solenoid has a similar shape to that of a bar magnet. |
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What is the shape of the magnetic field around a solenoid? |
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Adding an iron core increases the strength of the
magnetic field of a solenoid. |
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How does adding an iron core affect the magnetic field? |
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An electromagnet is a solenoid with an iron core. |
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What is an electromagnet? |
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Students should be able to describe how the magnetic effect of a current can be demonstrated |
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Describe how the magnetic effect of a current can be demonstrated |
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Students should be able to draw the magnetic field pattern for a straight wire carrying a current and for a solenoid (showing the direction of the field) |
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What does the magnetic field around a straight wire look like? |
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Students should be able to explain how a solenoid arrangement can increase the magnetic effect of the current. |
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How does a solenoid arrangement increase the magnetic effect of the current? |
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(Physics only) Students should be able to interpret diagrams of electromagnetic devices in order to explain how they work. |
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(Physics only) Give students diagrams of different devices which involve an electromagnet, such as a door bell. Students to explain how the device works. |
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