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Questions and Answers
What is the orientation of the needle in relation to the straight wire in Oersted's experiment?
What is the orientation of the needle in relation to the straight wire in Oersted's experiment?
- Tangential to an imaginary circle with the wire as its center (correct)
- Perpendicular to the wire
- Parallel to the wire
- Aligned with the earth's magnetic field
Which phenomenon did Danish physicist Hans Christian Oersted notice during a lecture demonstration in 1820?
Which phenomenon did Danish physicist Hans Christian Oersted notice during a lecture demonstration in 1820?
- The deflection of a magnetic compass needle caused by a current in a straight wire (correct)
- The tangential alignment of a magnetic compass needle with an imaginary circle
- The reversal of the orientation of a magnetic compass needle
- The alignment of a magnetic compass needle 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 orientation of the needle remains the same
- The needle becomes aligned with the earth's magnetic field
- The needle becomes parallel to the wire
- The orientation of the needle also reverses (correct)
When does the deflection of the needle become noticeable?
When does the deflection of the needle become noticeable?
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What happens to the deflection of the needle when the current is increased or the needle is brought closer to the wire?
What happens to the deflection of the needle when the current is increased or the needle is brought closer to the wire?
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