A rectangular coil of 200 loops has side of lengths 20 cm and 10 cm.
The coil has resistance of 2 Ohm. The coil is placed in a magnetic field so that the plane
of the coil is perpendicular to the magnetic field.
When the magnetic field is decreased at a rate of 5 T per second, what is the induced
current in the coil?
physics about induced current
2010-04-04 10:34 pm
回答 (1)
2010-04-04 11:01 pm
✔ 最佳答案
By Faraday's Law, induced emf equals to the rate of change of magnetic flux linkage with the coil.induced emf = 5 x (20 x 10 x 10^-4) x 200 v = 20 v
By Ohm's Law, current through the coil = 20/2 A = 10 A
收錄日期: 2021-04-29 17:37:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100404000051KK00678