At the balanced condition of the Wheatstone bridge, ‌
R
S
=‌
L1
L−L1
⇒‌‌‌
12
6
=‌
x
72−x
⇒‌‌x=48cm ∴ The galvanometer jockey is placed at P on AB at a distance of 48 cm from the A. So, the value of the x to the nearest integer is 48 .