Question

1)Consider thearrangement shown in Figur?below. Assume that R is 7.3 ?, I= 1.17 m, and a uniform 4.4 T magnetic field is directed into the page, At what speed (m/s) should the bar be moved to produce a current of 0.500 A in the.resistr? Round your answer to 2 decimal place app Two long straight parallel wires of length L carry currents of ly and l2 in the same direction. The force between themis Oattractive inversely proportional to L zero repulsive The magnetic force between two long straight parallel wires separated by a distance d is O proportional to 1/d O proportional to d O proportional to the distance d between them O proportional to 1/d2

Answer 1

Initial velocity = 34 mp/h = 34 times 1.467 ft/s = 49.88 ft/s v_f = 0, a = -9 ft/s^1 but V^2 = u^2 + 2as => S = (49.88)^2/2 times 9 => s = 138.21 ft so remaining distance = 170 - 138.21 = 31.79 ft by S = V_i t => t = 31.79/49.88 => t_max = .637 sec (2) weight = V_in rho omega g = 4 times 6 times .044 times 10^3 times 9.8 = 10.35 times 10^3 N