Questions and Answers
What effect does an electric current have on a compass needle?
It causes the needle to rotate
What happens when a straight thick copper wire is placed between the points X and Y in an electric circuit?
The wire behaves like a magnet
How are electricity and magnetism related?
Electricity and magnetism are linked to each other
What is the significance of observing the change in the position of the compass needle when an electric current is passed through the circuit?
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What is the relationship between moving magnets and electric effects?
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What did Hans Christian Oersted accidentally discover in 1820?
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What is the region surrounding a magnet, in which the force of the magnet can be detected, called?
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What do iron filings align themselves along, when placed near a bar magnet?
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What happens to a compass when placed near the north pole of a bar magnet?
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What is the unit of magnetic field strength named in honor of Hans Christian Oersted?
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What is the significance of the deflection of the compass needle when a current is passed through the copper wire?
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What was the key observation in Activity 13.1 when the compass was placed near the copper wire in the electric circuit?
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How is electricity related to magnetism based on the observations from Activity 13.1?
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What does the deflection of the compass needle near the copper wire demonstrate about electricity and magnetism?
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What is the main relationship observed between the electric current and the deflection of the compass needle in Activity 13.1?
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What phenomenon did Hans Christian Oersted accidentally discover in 1820?
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What technology was created based on Hans Christian Oersted's research on electromagnetism?
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What does the alignment of iron filings along the magnetic field lines demonstrate?
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What does the end of a compass needle pointing towards north represent?
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In which century did Hans Christian Oersted play a crucial role in understanding electromagnetism?
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Study Notes
Electromagnetism
- An electric current affects a compass needle, causing it to deflect.
- A straight thick copper wire placed between points X and Y in an electric circuit causes a compass needle to deflect.
Oersted's Discovery
- Hans Christian Oersted accidentally discovered the relationship between electricity and magnetism in 1820.
- Oersted's discovery led to the development of technologies based on electromagnetism.
Magnetic Fields
- The region surrounding a magnet, where the force of the magnet can be detected, is called a magnetic field.
- Iron filings align themselves along the magnetic field lines when placed near a bar magnet.
- A compass needle near the north pole of a bar magnet deflects.
Unit of Magnetic Field Strength
- The unit of magnetic field strength is named after Hans Christian Oersted, in honor of his discovery.
Electricity and Magnetism
- The deflection of the compass needle when a current is passed through the copper wire demonstrates the relationship between electricity and magnetism.
- The key observation in Activity 13.1 shows that electricity is related to magnetism.
- The deflection of the compass needle near the copper wire demonstrates that an electric current produces a magnetic field.
Historical Context
- Hans Christian Oersted played a crucial role in understanding electromagnetism in the 19th century.
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