Short answerEasy1 mark
3(iii)
A copper conductor is placed over two stretched copper wires whose ends are connected to a D.C. supply as shown in the diagram.
What should be the magnetic poles at the points A and B lying on either side of the conductor to experience the force in the upward direction?
Topic: Force on a current-carrying conductor
Question wording verified against source paper
Answer
Exam answer
North pole at A and south pole at B.
Explanation
This field direction gives an upward force for the shown current.
More from Electromagnetism
The diagram below shows the top view of the Wire A shown by a cross (X), carrying current into the plane of the paper. Which of the compasses is correctly aligned with the magnetic field produced by the current carrying wire?
(a) Only 1 is aligned
(b) Only 2 is aligned
(c) Both 1 and 2 are aligned
(d) Both 1 and 2 are not aligned2026intensifies the magnetic field.2026maintains electrical contact between the rotating parts and the external circuit.2026in the direction of the motion of the magnet?2026in the opposite direction of the motion of the magnet?2026The following figure shows a small bar magnet falling freely through a copper ring. For the observer at A, the direction of the induced current will be :
(a) clockwise when magnet is above and below the ring
(b) anticlockwise when magnet is above and below the ring
(c) anticlockwise when magnet is above the ring and clockwise when the magnet is below the ring
(d) clockwise when magnet is above the ring and anticlockwise when the magnet is below the ring2025