Two long horizontal rails of negligible resistance are a distance apart and are…
PHYSICS · Multi-part · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Electromagnetic induction and alternating-current circuits · Electromagnetic induction and alternating-current circuits
Electricity, Magnetism and Electromagnetism, Ch Faraday's law, motional emf and Lenz's law
Problem
Two long horizontal rails of negligible resistance are a distance L=0.40m apart and are joined at one end by a resistor R=3.0Ω. A straight metal rod of negligible resistance lies across the rails, making good contact with both, and is pushed along them at a constant speed v=6.0ms−1. A uniform magnetic field of magnitude B=0.25T is perpendicular to the horizontal plane of the rails. Friction is ignored.
((a)) Find the magnitude of the emf developed along the rod.
((b)) Find the current in the resistor.