Question

Assume that every numerical data has 3 significant digits. Express the final numerical answers with 3 significant digits. Use scientific notation when appropriate. A square loop has 25 turns and sides of a = 2 cm and b = 5 cm. There is an external magnetic field of 0.3 T, parallel to the plane of the loop and the shorter sides, and perpendicular to the longer sides. Has clockwise current of 8A Find: a. The net force on the loop. b. The net torque on the loop.

Answer 1

on a current 5 os B B For side bc Solulim = B = 0.3T (a) magnetic force carrying wire is F = I lXB Ed B sino where o is angle bete behoeen Clengoth vectore) and B magnetic field For side ab and cd sine = 0 angle is 0 and 180 respectively for side ad and bc. I has same value Using Right hand Rule, the force IF Forsidead on side ad is into the page and force on side be is coming out of page > As peces are equal and opposite in direction, there is no resultant force loop solution B The net torque on loop is given by T= NIAB Simo N = number of twens = 25 T = 25 X 8 X 2X10 ? x 5 x 10 x 0.3 0 = 90 Uperpendicular A area of loop T = 0.060 I= current T = torque A = (2x10-?)m X (5x10 m. on Nm A = 2cm x 5cm