A wooden bobbin consists of two coaxial of radius r and the

Last updated: 6/10/2023

A wooden bobbin consists of two coaxial of radius r and the outer is of radius R A conducting wire PQ wrapped on the outer cylinder passes through a small hole in it and then it is wrapped on the inner cylinder in the same sense Now the bobbin is placed on a horizontal table where a uniform and constant magnetic field B exists parallel to the axis of the bobbin If one end P of the wire is fixed on the tabletop and the other end Q is pulled horizontally with a constant velocity u as shown in the figure the bobbin rolls without slipping An ideal voltmeter is connected between the end P and a stationary sliding contact S mp P R SQ u a Find the moduli of electromotive forces induced in each of the coils 2 wrapped on the bobbin E Buf Ei Burz b Hence or otherwise find the reading of the voltmeter 2 R Y Bcllu