Question

The figure below shows a 50 cm long bar attached to ideal frictionless parallel wires. The bar is free to slide along the wires but its orientation is fixed by the attachments. The bar is pulled by an external force at a constant velocity along the wires in the presence of a B = 1.70 T magnetic field which points into the screen. The parallel wires are connected to a R = 22.0 12 resistor and the bar makes an angle of = 30° with the wires. A I = 0.20 A induced current is measured in the resistor labeled R. The bar itself has a resistance r = 4.0 2 and a diameter of 0.7 cm. © K x x R x Part A - Determine the magnitude of the magnetic force on the bar. НА ? F3 = Value Units

Answer 1

x x x R 3 Giren L=50cm = 0.5m B-1.71, R: 222 0:30° I - 0.2A part A The magnitude of magnetic forco If I LB sino XIF) = 0.2x0.5 X 1.7 x Sin 30 => ) Fl: 0.085N part B induced from lenz's law the direction current such a way that from where it has produced it it Oppose so the induced current direction is counterclockwise

Part-c The &- l e (oxB) => E= Bulsino Here angle between co s B is gou so & BUL IR BOL => 103 IR BU => 1 0.2 x 22 1.780.5 v= 5.176 m/s part. D RA The resistiving f: R 48xr ( 6 7 8 x 104 PE 0.5 P = -4 3.078 x 10 20 induced emf of bar is