Practicing Success
A meter bridge is set up as shown, to determine an unknown resistance ‘X’ using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of ‘X’ is |
10.2 ohm 10.6 ohm 10.8 ohm 11.1 ohm |
10.6 ohm |
At Null point $\frac{X}{l_1}=\frac{10}{l_2}$ Here $l_1$ = 52 + End correction = 52 + 1 = 53 cm $l_2$ = 48 + End correction = 48 + 2 = 50 cm ∴ $\frac{X}{53}=\frac{10}{50}$ ∴ $X=\frac{53}{5}=10.6 \Omega$ |