Copyright © Michael Richmond.
This work is licensed under a Creative Commons License.
A circular loop of wire has radius 1 cm. The loop is immersed in a uniform magnetic field of strength B = 0.1 T.
Question 1: What is the magnetic flux through the loop?
Answer: mag flux = (area) * (mag field)
= (pi * 0.01 m * 0.01 m) * (0.1 T)
= 3.1 x 10^(-5) Weber
Question 2: The magnetic field strength decreases to zero over a period of t = 10 seconds . How large is the average voltage induced between points A and B during that period?
Answer: change in mag flux 0 - 3.1 x 10^(-5) Wb
induced voltage = ------------------ = ---------------------
time 10 seconds
= 3.1 x 10^(-6) volts
Question 3: Which way does the induced voltage cause current to flow around the loop?
Answer: counterclockwise
Copyright © Michael Richmond.
This work is licensed under a Creative Commons License.