Physics · 2022
JEE Main · 26 July 2022, Shift 1 · Q56
Resistances are connected in a meter bridge circuit as shown in the figure. The balancing length l_1 is 40 cm. Now an unknown resistance x is…
Resistances are connected in a meter bridge circuit as shown in the figure. The balancing length $\displaystyle l_1$ is $\displaystyle 40$ cm. Now an unknown resistance $\displaystyle x$ is connected in series with P and new balancing length is found to be $\displaystyle 80$ cm measured from the same end. Then the value of $\displaystyle x$ will be \_\_\_\_ $\displaystyle \Omega$.
Official answer
20
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