In this lesson, we will learn how to analyze the current induced in conducting loops by changing magnetic fields and the magnetic field due to a current loop.
Students will be able to
Q1:
A circular conducting loop has a radius 𝑟. The north pole of a permanent magnet faces perpendicularly to the plane of the loop, as shown in the diagram. The permanent magnet is moved in the positive 𝑧-direction. Also shown in the figure are the magnetic field lines from the north pole that intersect the loop at points 𝐴 and 𝐵.
Which of the following is the direction of the current induced in the loop at point 𝐴 within the plane of the loop?
Which of the following is the direction of the current induced in the loop at point 𝐵 within the plane of the loop?
Which of the following is the direction of the magnetic field that is produced by the current induced in the loop?
Q2:
A conducting coil with a radius of 4.5 cm has 120 turns. The coil moves perpendicularly to a magnetic field that decreases in strength from 15 mT to 11 mT. A 12.5 mV emf is induced while the coil moves. Find the time for which the coil moves. Give your answer to two decimal places
Q3:
A conducting coil with a radius of 2.5 cm has 150 turns. The coil moves perpendicularly to a magnetic field that becomes stronger at the rate of 1.8 mT/s. Find the magnitude of the electromotive force induced in the coil. Give your answer to two decimal places.
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