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  4. 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 Ω, then the value of unknown resistance ' S ' will be Ω

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Q. 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 _____$\Omega$Physics Question Image

JEE MainJEE Main 2022Physical World, Units and Measurements

Solution:

$ \frac{ S }{30}=\frac{5.6 \times 10^3}{70}$
$ S =\frac{3}{7} \times 5.6 \times 10^3=2400$