Electron revolving with speed v is producing magnetic field B at centre. Find relation between radius of path B and v ?

Step-by-step solution

Magnetic field at center, B= ₀ I 2 r where, I= e t or I = e ( 2 r v ) = ev 2 r Hence, B= ( ₀ 2 r ) ( ev 2 r )= ₀ ev 4 r ^2 or B V r^2