A loop of wire is moving near a long, straight wire carrying a constant current
ID: 1262772 • Letter: A
Question
A loop of wire is moving near a long, straight wire carrying a constant current I as shown in the figure below.
(a) Determine the direction of the induced current in the loop as it moves away from the wire.
clockwise
counterclockwise
into the page
out of the page
(b) What would be the direction of the induced current in the loop if it were moving toward the wire?
clockwise
counterclockwise
into the page
out of page
A loop of wire is moving near a long, straight wire carrying a constant current I as shown in the figure below. A loop of wire is moving near a long, straight wir (a) Determine the direction of the induced current in the loop as it moves away from the wire. clockwise counterclockwise into the page out of the page (b) What would be the direction of the induced current in the loop if it were moving toward the wire? clockwise counterclockwise into the page out of pageExplanation / Answer
The magnetic field enclosed by the wire isout of the page, and it weakens.
Thus, the wire has to compensate for that loss, it must produce a magnetic field out of the page to prevent change in flux.
Thus, by right hand rule, the induced current is CUNTERCLOCKWISE. [ANSWER, PART A]
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Moving towards the wire, the magnetic field out of the page becomes stronger, and the wire has to counter it to prevent change in flux.
Thus, it must induce a magnetic field into the page, and the current this time is CLOCKWISE. [ANSWER, PART B]
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