Questions and Answers
What did Oersted discover in 1820?
A current in a wire affected a compass needle
How is the shape of wires carrying current related to the shape of the magnetic field created?
A current loop creates a magnetic field similar to that of a bar magnet
How is the direction of a current-created field related to the direction of the current?
The direction of a current-created field is related to the direction of the current
How can one explore the direction of a magnetic field around a long straight wire?
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What can determine the magnitude of the magnetic field around a long straight wire?
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What is one way to explore the direction of a magnetic field around a long straight current-carrying wire?
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What did Oersted discover in 1820 regarding the effect of a current in a wire on a compass needle?
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What type of field is created around a long straight wire carrying current?
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How does the shape of wires carrying current affect the shape of the magnetic field created?
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What is one way to determine the magnitude of the magnetic field around a long straight wire?
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Study Notes
Hans Christian Oersted's Discovery
- In 1820, Oersted discovered that an electric current in a wire affects a nearby compass needle, demonstrating the existence of a magnetic field around the wire.
Magnetic Field Shape and Wire Shape
- The shape of the wire carrying current affects the shape of the magnetic field created around it.
Current Direction and Magnetic Field Direction
- The direction of the magnetic field created by a current is related to the direction of the current.
Exploring Magnetic Field Direction
- One way to explore the direction of a magnetic field around a long straight wire is to use a compass needle.
Magnetic Field Magnitude
- The magnitude of the magnetic field around a long straight wire can be determined by thestrength of the current and the distance from the wire.
Type of Field Created
- A long straight wire carrying current creates a magnetic field around it.
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