http://www.v1.tcyonline.com/group/the-general-knowledge-den/4933 New grp guyz...interested ppl can join 2 improve upon der GK....dnt frgt guyz...AIIMS do test our GK as well ;)
a circular copper disc 10cm in diameter rotates at 1800rpm about an axis passing through its center and normal to its plane.A uniform magnetic field of 1 wbm(-2) exists normal to the disc then the potrntial difference developed b/w the axis and the rim of the disc is? a)0.023V b)0.23V c)23V d)230V ..help to solve guys..