NEET Exam Model Paper 7

Two cells of emf ε1 and ε2(ε1>ε2) are connected as shown in figure. When a potentiometer is connected between A and B, the balancing length of the potentiometer wire is 300 cm. on connecting the same potentiometer between A and C, the balancing length is 100 cm. The ratio ε1:ε2 is