a steady e.m.f . of 1.62 V is maintained across two platinum electrodes placed in a solution of CuCl2 . At the end of 600 sec , the mass of copper deposited = 3.175 g. the back e.m.f of voltameter is given to be 1.427 V. Calculate the resistance of the voltameter. faraday current = 96500 C/mol , copper atomic wt = 63.5 g