Question
A conducting U-tube can slide inside another U-tube maintaining electrical contact between the tubes. The magnetic field is perpendicular to the plane of paper and is directed inward. Each tube moves towards the other at constant speed v. Find the magnitude of induced emf across the ends of the tube in terms of magnetic field B, velocity v and width of the tube I.
Solution
The magnetic field is perpendicular to the paper and direct inward.
Relative velocity of the tube of width I = v – (– v) = 2v
induced emf is given by,
Relative velocity of the tube of width I = v – (– v) = 2v
induced emf is given by,
