1- (25 Points) A conducting bar of length L, mass M and electrical resistance R can slide down a long conducting frame without friction. The frame is inclined by angle & from the horizontal and has no electrical resistance. The whole system is in a constant downward magnetic field B= B,J. and there is also the gravitational field gj. The bar starts sliding down. a) What is the magnitude of the EMF induced in the closed circuit at the moment when the bar has speed v? b) What is the magnetic force on the bar at the moment when the bar has speed v? c) What is the maximal speed the bar can reach