Lesson: Induced Electric FieldsPhysics
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
A 50-turn coil with a diameter of 15 cm is placed in a spatially uniform magnetic field of magnitude 0.50 T. The face of the coil and the magnetic field are perpendicular to each other. Assume that the magnetic field is cylindrically symmetric with respect to the central axis of the coil. Calculate the magnitude of the electric field induced if the magnetic field is reduced to zero in 0.10 seconds.
Over a region of radius , there is a spatially uniform magnetic field (shown in the figure). At , , after which decreases to 0 T in 30 seconds at a constant rate. Protons can move in the region of the magnetic field. The charge of a proton is C.
If , how much work is done by the electric field induced in the region on a proton that moves once in a clockwise circular path of radius 5.0 cm?
At an instant when , a proton enters the magnetic field at , moving at m/s. What is the magnitude of the magnetic force on the proton at that instant?
At an instant when , a proton enters the magnetic field at , moving at m/s. What is the magnitude of the electric force on the proton at that instant?
The current in a long solenoid of radius 3.0 cm and 480 turns per meter 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.