Question

In a meter bridge experiment, for measuring unknown resistance ‘S’, the null point is obtained at a distance 30 cm from the left side as shown at point D. If R is 5.6 kΩ, then the value of unknown resistance ‘S’ will be ___Ω.

Fig. Meter Bridge

Answer 1

The correct answer is 2400
$\frac{R}{S}=\frac{70}{30}$
$S=\frac{3}{7}×5.6×10^3$
$=2.4×10^3Ω=2400Ω$
$\therefore$ the value of unknown resistance ‘S’ will be 2400Ω.