Lesson: Electromagnetic Interactions in Conducting Loops High School Physics

Physics

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.

Video

15:11

Sample Question Videos

03:01

Worksheet

Q1:

A circular conducting loop has a radius . 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 -direction. Also shown in the figure are the magnetic field lines from the north pole that intersect the loop at points and .

Which of the following is the direction of the current induced in the loop at point 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.

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.

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