A copper wire with  cross-sectional  area `S = 2.5 mm^(2)` bent  to make three  sides of a square
Channel: Doubtnut
Date: 2020-08-23

A copper wire with  cross-sectional  area `S = 2.5 mm^(2)` bent  to make three  sides of a square  can  turn about a horizontal  axis `OO'`  (Fig). The wire  is located  in unifrom  vertical  magnetic  field. Find the  magnetic  induction  if on passing  a current `I = 16 A`  through   the wire  the latter  deflects  by an angle `theta = 20^(@)`. img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/IROD_V01_C03_E01_253_Q01.png" width="80%"