Physics · 2022
JEE Main · 25 July 2022, Shift 1 · Q58
Eight copper wire of length l and diameter d are joined in parallel to form a single composite conductor of resistance R. If a single copper wire of…
Eight copper wire of length $\displaystyle l$ and diameter d are joined in parallel to form a single composite conductor of resistance R . If a single copper wire of length $\displaystyle 2 l$ have the same resistance (R) then its diameter will be \_\_\_\_ d.
Official answer
4
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