Podcast
Questions and Answers
Which phenomenon did Hans Christian Oersted discover during his lecture demonstration in 1820?
Which phenomenon did Hans Christian Oersted discover during his lecture demonstration in 1820?
- The reversal of the needle's orientation
- The alignment of the needle with the wire
- The deflection of the compass needle by a current in a wire (correct)
- The relationship between electricity and magnetism
What is the orientation of the needle when a current flows through the wire?
What is the orientation of the needle when a current flows through the wire?
- Parallel to the wire
- Tangential to an imaginary circle (correct)
- Perpendicular to the wire
- Aligned with the earth's magnetic field
What happens to the orientation of the needle when the direction of the current is reversed?
What happens to the orientation of the needle when the direction of the current is reversed?
- The needle remains in the same orientation
- The needle aligns with the earth's magnetic field
- The needle points towards the wire
- The orientation of the needle is reversed (correct)
What factors affect the deflection of the compass needle?
What factors affect the deflection of the compass needle?
What did the iron filings around the wire form?
What did the iron filings around the wire form?
Which equation represents the force experienced by a charge q in an electric field E?
Which equation represents the force experienced by a charge q in an electric field E?
Who stressed the concept of a field and incorporated it into the unification of electricity and magnetism?
Who stressed the concept of a field and incorporated it into the unification of electricity and magnetism?
How do multiple charges contribute to the electric field at a particular point?
How do multiple charges contribute to the electric field at a particular point?
Can electric fields vary with time?
Can electric fields vary with time?
What is the physical role of an electric field?
What is the physical role of an electric field?
Flashcards
Oersted's discovery
Oersted's discovery
A current-carrying wire deflects a compass needle.
Needle's orientation
Needle's orientation
Tangential to a circle around the wire.
Current reversal effect
Current reversal effect
Needle orientation reverses with current direction.
Deflection factors
Deflection factors
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Iron filings shape
Iron filings shape
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Force on charge (equation)
Force on charge (equation)
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Field concept proponent
Field concept proponent
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Multiple charges' effect
Multiple charges' effect
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Time-variable electric fields?
Time-variable electric fields?
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Electric field role
Electric field role
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