Two cells of emf ε1 and ε2 (ε2 < ε1 ) are joined as shown in figure :
When a potentiometer is connected between X and Y it balances for 300 cm length against ε1 . On connecting the same potentiometer between X and Z it balances for 100 cm length against ε1 and ε2 Then the ratio ε2/ε2 is :
(A) 1/3
(B) 3/4
(C) 1/4
(D) 2/3
