Guide A (fixed) Guide B (fixed) Sticks free to slide on the guides

A long, rectangular loop of width w, mass M, and resistance Ris at rest, with the plane of the loop parallel to the ground. Immediately to the left of the loop is a region of uniform magnetic field B that points into the screen. At time í = 0, a constant force F pushes the loop to the left, into the magnetic field region, as shown in the figure. Derive an expression for the speed v of the loop immediately after it enters the magnetic field region in terms of the given variables and the time t. U =

Shown below is a conducting rod that slides along metal rails. The apparatus is in a uniform magnetic field of strength 0.2 T, which is directly into the page. The rod is pulled to the right at a constant speed of 6 m/s by a force F. The only significant resistance in the circuit comes from the 2-Q resistor shown. (a) What is the voltage induced in the circuit? (b) What is the induced current? (c) What is the magnitude of F? (d) What are the power output of F and the power dissipated in the resistor? 2.0 2 4.0 cm Hint a. Voltage of is induced. b. An induced current of mA flows in Select an answer v direction. c. Force F of magnitude mN is needed to maintain the constant speed. d. Force F does work at the rate of mW; power of mW is dissipated in the resistor.

A long wire of current I and a thin rectangular copper loop lie in the plane of the page. If the loop moves to the right at a constant velocity by an external force, what would be the direction of the induced current in the moving loop, clockwise or counterclockwise?