Lesson: Induced Electric Fields
In this lesson, we will learn how to use Faraday's law to calculate the magnetic and electric fields produced through electromagnetic induction.
Sample Question Videos
Worksheet: 6 Questions • 1 Video
The current in a long solenoid of radius 3.0 cm is varied with time at a rate of 2.0 A/s. A circular loop of wire with a radius of 5.0 cm and a resistance of 2.0 Ω surrounds the solenoid. Find the current induced in the loop.
A circular copper disk of radius 7.5 cm rotates at rpm around the axis through its center and perpendicular to its face. The disk is in a uniform magnetic field of strength 1.2 T that is directed along the axis. What is the potential difference between the rim and the axis of the disk?
Shown in the following figure is a long, straight wire and a single-turn rectangular loop, both of which lie in the plane of the page. The wire is parallel to the long sides of the loop and is 0.50 m away from the closer side. At an instant when the emf induced in the loop is 2.0 V, what is the time rate of change of the current in the wire?