A positive charge q is carried from point B to A in the electric field of charge Q held at O. If the permittivity of free space is εo, OA = a and OB = b, then what is the work done in this process? |
qQ/(4πεo)[1/a + 1/b] qQ/(4πεo ) [1/a-1/b] qQ/(4πεo ) [1/a2 + 1/b2 ] qQ/(4πεo ) [1/a2-1/b2] |
qQ/(4πεo ) [1/a-1/b] |
W = q[Va - Vb] |