A `0.5m` long metal rod `PQ` completes  the circuit as shown in the figure. The area of the
Channel: Doubtnut
Date: 19/04/2020

A `0.5m` long metal rod `PQ` completes  the circuit as shown in the figure. The area of the circuit is perpendicular to the magnetic field of flux density `0.15  T`. If the resistance of the total circuit is `3Omega` calculate the force needed to move the rod in the direction as indicated with a constant speed of `2 ms^(-1)`   img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/RES_ELE_PHY_V02_XII_C02_E01_200_Q01.png" width="80%"