Figure 38 W14a shows a conducting circular loop of radius a

Last updated: 6/24/2023

Figure 38 W14a shows a conducting circular loop of radius a placed in a uniform perpendicular magnetic field B A metal rod OA is pivoted at the centre O of the loop The other end A of the rod touches the loop The rod OA and the loop are resistanceless but a resistor having a resistance R is connected between 0 and a fixed point C on the loop The rod OA is made to rotate anticlockwise at a small but uniform angular speed a by an external force Find a the current in the resistance R and b the torque of the external force needed to keep the rod rotating with the constant angular elocity w A E Boa 2 X X R 240 0 Cx a 3 A X R OF HA b