question_answer

A uniform wooden bar of mass \[\frac{\pi }{100}\]kg and radius kg and radius of cross-section 10 cm carries a light coil C of 100 turns. The bar is smoothly pivoted at P. If the coil carries a current 2A and subjected to external magnetic field\[{{10}^{-2}}T\], the bar remains in equilibrium, the distance x (in cm) of the C.M. of the rod from the pivot is\[10\times a\], then the value of a is.

Answer:

2.00