summary13 - Faraday’s Law of Induction Induction Magnetic...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Faraday’s Law of Induction Induction Magnetic flux = A B cos B A A changing magnetic flux generates an induced voltage an induced voltage (emf = electromotive force) = (ABcos )final – (ABcos )initial (AB V = [emf] = - N / t [emf] Motional EMF Voltage induced in a moving induced in moving conductor Velocity Vmax = [emf] = -Blv Length Induced emf depends on angle between the Magnetic field and the velocity direction. Lenz’s Law An induced emf gives rise to a current whose magnetic field opposes the original change in flux new, larger B Induced current Induced B Lenz’s Law Exercises Applications of Faraday’s Law Eddy Currents Transformer: • Primary and secondary coils and secondary coils • Iron yoke (to contain flux) • AC voltages only ! • No loss -> Input power = output power V2 N2 I1 V1 = N1 = I2 Electric Generator: angular velocity = 2f Alternating (AC) voltage = BAcos(t) t V t Electromagnetic Waves 0 0 0 Speed of light (Constant of Nature) c = 299 792 458 m/s (3 x 108 m/s) Also: c = frequency times wavelength c=f ...
View Full Document

This note was uploaded on 06/03/2011 for the course PHY 112 taught by Professor Beacom during the Spring '11 term at Ohio State.

Page1 / 7

summary13 - Faraday’s Law of Induction Induction Magnetic...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online