A currrent I  is passed through  a silver strip of width d and area of cross section A. The  number
Channel: Doubtnut
Date: 12/07/2020

A currrent I  is passed through  a silver strip of width d and area of cross section A. The  number of free electrons per unit volume is n. (a)  Find the drift  velocity v of the electrons. (b) If a magnetic field B exists in the region as shown  in what is the average magnetic force on the free electrons? (c) Due to the magnetic force, the free electrons get accumulated on one side of the conductor along its length. This produces a transverse electric field in the  conductor which opposes the magnetic force on the electrons. Find the magnitude of the electric field which will  be the potential diference developed across the width of the conductor due to the electron- accumulation? The appearance of a transverse emf, when a current-carrying wire is placed in a magnetic field, is called hall effect.