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  4. 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

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Q. 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 ' $X$ ' isPhysics Question Image

JEE AdvancedJEE Advanced 2011

Solution:

$X (48+2)=(10)(52+1)$
$X =\frac{530}{50}=10.6\, \Omega$