Magnetic Effects Of Current Question 373
Question: A square cardboard of side ℓ and mass m is suspended from a horizontal axis XY as shown in figure. A single wire is would along the periphery of board and carrying a clockwise current I. At $ t=0 $ , a vertical downward magnetic field of induction B is switched on. Find the minimum value of B (in T) so that the board will be able to rotate up to horizontal level. ( $ m=1kg,I1 $ amp, $ \ell =1 $ metre)
Solution:
Answer: 5.00
BETA
