In circuit shown in adjoining figure, current between B and D is zero, unknown resistance is of ....

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3.Current Electricity

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In the circuit shown in the adjoining figure, the current between $B$ and $D$ is zero, the unknown resistance is of ................ $\Omega$

A

$4$

B

$2$

C

$3$

D

$\mathrm{emf}.$ of a cell is required to find the value of $X$

Solution

(b) By balanced Wheatstone bridge condition $\frac{{16}}{X} = \frac{4}{{0.5}}$

$ \Rightarrow $ $X = \frac{8}{4} = 2\,\Omega $

Standard 12

Physics

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(AIPMT-1999)