20. The figure shows a rod that is forced to move at constant speed v = 2.0 m/s along the horizontal rails, which are separated by distance L = 10 cm. The rod, rails, and connecting resistor at the left form a conducting loop. The entire apparatus is placed in a uniform 0.80 T magnetic field pointing into the page. If the induced current through the loop is 10 mA, what is the force applied to the rod? Assume no mechanical resistance and all energy supplied by the force turns into heat in the loop. (1) 220 (N (2) 4 mN (3) 48 mN y (4) 12 mN (5) 0.8 m

In the figure below, an iron bar sitting on two parallel copper rails, connected to each other by a resistor, is pulled to the right at a constant speed. The resistance R = 6.00 02, the distance between the rails is l = 1.20 m, and a uniform 2.10 T magnetic field is directed into the page. At what speed (in m/s) should the bar be moved to produce a current of 0.500 A in the resistor? {R m/s Fapp ℗

A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 1.6 x10 rev/min as indicated in the figure. The horizontal component of the Earth's magnetic field at the coil's location is equal to 2.00 x 10T. Calculate the maximum emf induced ( in units of mV) in the coil by this field. 20.0 cm 20.0 cm

The slide generator in the figure below is in a uniform magnetic field of magnitude 0.0500 T. The bar of length 0.345 m is pulled at a constant speed of 0.500 m/s. The U-shaped conductor and the bar have a resistivity of 2.75 x 10-8 · m and a cross-sectional area of 8.50 x 10-4 m². Find the current in the generator when x = 0.680 m. (Note that the A in the image below is the area of the loop, not the cross-sectional area of the conductor and bar.) 313600 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. A Bulb is unlit. A. B. Bulb is lit. loo F mech