FOR PICTURE of CIRCUIT: community.webshots.com/photo/2479536900103460081IWuFAY A wheel consiting of a large number of thin conducting spokes is free to rotate about its axle. The brush makes contact one spoke at a time. There is a uniform B field pointing into the page. The wheel is initially at rest. R = radius of wheel J = moment of inertia of wheel L = inductance of circuit V = voltage QUESTION: Find an expression relating ω(t) with I(t) by calculating the torque on the wheel. ATTEMPT: I tried using τ = dL/dt and L=Jω to get that τ = J*dω/dt. For the other half of the expression I use τ = r x F. I am unclear how to do that part. Any help would be awesome, thanks!