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Physics · 2025 · 2 marks
CBSE 2025 · Region 7 · Set 2 · Q17
Two wires made of the same material have the same length ( l ) but different cross-sectional areas A_1 and A_2. They are connected together with a…
Two wires made of the same material have the same length ( $\displaystyle l$ ) but different cross-sectional areas $\displaystyle \mathrm{A}_{1}$ and $\displaystyle \mathrm{A}_{2}$. They are connected together with a cell of voltage V. Find the ratio of the drift velocities of free electrons in the two wires when they are joined in (i) series, and
(ii)
parallel.
Marking-scheme solution
Finding the ratio of drift velocities when joined in
(i) Series
(ii) Parallel $\displaystyle 1$All Current Electricity questions2025 question paperNCERT solutions: Current ElectricityPractice Current Electricity →
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.