In meter bridge experiment for measuring unknown resistance ' S ', null point is obtained at

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3.Current Electricity

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In 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 $5.6 k \Omega$, then the value of unknown resistance ' $S$ ' will be $\Omega .$

A

$240$

B

$24$

C

$48$

D

$2400$

(JEE MAIN-2022)

Solution

$\frac{ S }{30}=\frac{5.6 \times 10^{3}}{70}$

$S =\frac{3}{7} \times 5.6 \times 10^{3}=2400$

Standard 12

Physics

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