Physics · 2020
JEE Main · 9 January 2020, Shift 2 · Q23
In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is l=25 cm. If R is replaced by a…
In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is $\displaystyle l=25 \mathrm{~cm}$. If R is replaced by a wire of half length and half diameter that of R of same material, then the balancing distance $\displaystyle l^{\prime}$ (in cm ) will now be \_\_\_\_.
Official answer
40
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