As depicted in the figure, a conducting loop is being withdrawn from a magnetic field at a speed v . Which of the four plots shown in the figure could represent the power delivered by the pulling agent as a function of the speed v ?

Step-by-step solution

When a conducting loop is withdrawn from a uniform magnetic field, the motional emf induced in the loop is given by: = Blv where B is the magnetic field, l is the length of the side of the loop inside the magnetic field, and v is the speed of the loop. The induced current in the loop is: I = R = Blv R where R is the electrical resistance of the loop. The magnetic force acting on the current-carrying side of the loop opposes its motion (according to Lenz's law) and is given by: F = IlB = ( Blv R )lB = B^2l^2v R To p