A 100 turn rectangular coil ABCD (in XY plane) is hung from one arm of a balance (figure).
Channel: Doubtnut
Date: 2020-08-02

A 100 turn rectangular coil ABCD (in XY plane) is hung from one arm of a balance (figure). A mass `500g` is added to the other arm to balance the weight of the coil. A current `4*9A` passes through the coil and a constant magnetic field of `0*2T` acting inward (in xz plane) is switched on such that only arm CD of length `1cm` lies in the field. How much additional mass 'm' must be added to regain the balance?  img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_XII_V01_C03_S01_709_Q01.png" width="80%"