JAMB - Physics (2010 - No. 42)

The diagram above shows a balanced metre bridge, the value of x is

75.0 cm

66.7 cm

33.3 cm

25.0 cm

¹/_R = ¹/₈ + ¹/₈ = ²/₈
∴ R = 4Ω
^l/_l₁ = ^R/_R₁
(x)/(100-x) = 4/8
4(100-x) = 8x
400-4x = 8x
400 = 8x + 4x = 12x
x = 400/12 = 33.3cm