Podcast
Questions and Answers
What happens to the compass needle when the current is not flowing through the wire?
What happens to the compass needle when the current is not flowing through the wire?
When the current flows from A to B in the wire, what direction does the north pole of the compass needle deflect?
When the current flows from A to B in the wire, what direction does the north pole of the compass needle deflect?
What occurs when the connections at the terminals of the battery are reversed?
What occurs when the connections at the terminals of the battery are reversed?
Which component allows you to control the amount of current flowing through the wire in this experiment?
Which component allows you to control the amount of current flowing through the wire in this experiment?
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What observation is made when the key is closed and the current is actively flowing?
What observation is made when the key is closed and the current is actively flowing?
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Study Notes
Demonstrating Magnetic Fields Around Current-Carrying Conductors
- A compass needle can be used to demonstrate the magnetic field around a current-carrying conductor.
- When no current flows (key is open), the compass needle aligns with Earth's magnetic field, parallel to the wire.
- When current flows (key is closed) in a specific direction (A to B), the north pole of the compass needle deflects (towards the west).
- Reversing the current direction (reversing connections) reverses the deflection (north pole towards east).
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Description
Explore the principles of magnetic fields around current-carrying conductors through a series of questions. This quiz delves into how a compass needle responds to electrical currents and the effects of reversing current direction. Test your understanding of electromagnetic concepts and practical demonstrations.
