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Science · 2024 · 2 marks
CBSE 2024 · Region 5 · Set 1 · Q26
An electric source can supply a charge of 500 coulomb. If the current drawn by a device is 25 mA, find the time in which the electric source will be…
An electric source can supply a charge of $\displaystyle 500$ coulomb. If the current drawn by a device is $\displaystyle 25$ mA, find the time in which the electric source will be discharged completely.
Marking-scheme solution
\[\begin{aligned}
& Q=I \times t \\
& \therefore t=\frac{500 \mathrm{C}}{25 / 1000 \mathrm{~A}} \\
& =20000 \mathrm{~s}
\end{aligned}
\]
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.