Figure shows a rectangular loop conducting PQRS in which the arm PQ is free to move. A uniform magnetic field acts in the direction perpendicular to the plane of the loop. Arm PQ is moved with a valocity v towards the arm RS. Assuming that the arms QR, RS and SP have negligible resistances and the moving arm PQ has the resistance r, obtain the expression for (i) the current in the loop (ii) the force and (iii) the power required to move the arm PQ.

Figure shows a rectangular conductor PQRS in which the conductor PQ is free to move in a uniform magnetic field B perpendicular to the plane of the paper.The field extends from x=0 to x=b and is zero for x>b.Assume that only the arm PQ posses resistance r.When the arm PQ is pulled outward from x=0 with constant speed v, obtain the expressions for the flux and the induced emf with distance 0≤x≤2b

State Faraday's law of electromagnetic induction. Figure shows a rectangular conductor PQRS in which the conductor PQ is free to move in a uniform magnetic field B perpendicular to the plane of the paper.The field extends from x=0 to x=b and is zero for x gt b .Assume that only the arm PQ posses resistance r .When the arm PQ is pulled outward from x=0 with constant speed v , obtain the expressions for the flux and the induced emf. sketch the variations of these quantities with distance 0 le x le 2b .

A rectangular loop of wire is moved within the region of a uniform magnetic field acting perpendicular to its plane. What is the direction and magnitude of current induced in it ?