Question 100: Current Electricity

Question

A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10 $$\Omega$$ 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

Accepted Answer

Corrected length L
1
(AJ) = 52 + 1 = 53 cm
Corrected length L
2
(BJ) = (100 $$-$$ 52) + 2 = 50 cm
For a balanced Wheatstone bridge,
$${X \over {10}} = {{{L_1}} \over {{L_2}}} = {{53} \over {50}}$$
$$\Rightarrow$$ X = 10.6 $$\Omega$$

Answer

10.2 $$\Omega$$

Answer

10.6 $$\Omega$$

Answer

10.8 $$\Omega$$

Answer

11.1 $$\Omega$$

Current Electricity

A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10 $\Omega$ 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

Choose the correct answer: