A straight metallic rod of length moves with speed perpendicular to a uniform…
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A straight metallic rod of length ℓ moves with speed v perpendicular to a uniform magnetic field B. The free electron number density in the metal is n.
(a) Write the expression for the magnitude of the electric field set up inside the rod when steady charge separation is achieved.
(b) Hence obtain the expression for the emf induced between the two ends of the rod.