The Potentiometer wire of length 400 cm has a resistance of $20 \Omega$. It is connected in series with a resistance of $10 \Omega$ and a cell of emf 9 V having negligible resistance. A source of 2.4 V is balanced against a length L of the potentiometer wire. The value of L is:

160 cm 160 m 120 cm 125 cm

160 cm

The correct answer is Option (1) → 160 cm