This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 12b. EMF induced in a moving conductor B v t v x ∆ = ∆ l t lv x l A ∆ = ∆ = ∆ A ∆ t A B t B ∆ ∆ = ∆ ∆Φ = ε Another method: ⊕ B v F B F E qvB F B = qE F E = Blv El qvB qE = = ⇒ = ε 1) What is polarity of EMF ? 2) What would be the direction of the induced current, if rod slides on a conducting track ? Blv = ε The B field points out of the page . The flux is increasing since the area is increasing. The induced B field opposes this change and therefore points into the page . Thus, the induced current runs clockwise according to the righthand rule. Example: A uniform magnetic field B is perpendicular to the area bounded by the U shaped conductor and a movable metal rod of length l. The rod is moving along the conductor at a speed v . The total resistance of the loop is R . What is the induced emf, the current in the loop, the magnetic force on the moving rod, and power needed to move the rod?...
View
Full
Document
This note was uploaded on 12/10/2011 for the course PHYSICS 222 taught by Professor Frishman during the Spring '11 term at Iowa Central Community College.
 Spring '11
 frishman
 Current

Click to edit the document details