MHT CET Physics question

The current, in a potentiometer wire of 100 cm length, is adjusted to give a null point at 50 cm with a standard cell of e. m. f. 1.018 V. The e. m. f. of a cell which gives null point at 60 cm is

• (A)1.221 VCorrect
• (B)2.22 V
• (C)3.22 V
• (D)4.22 V