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Science · 2024 · 2 marks
CBSE 2024 · Region 5 · Set 2 · Q26
An electric source can supply a charge of 750 coulomb. If the current drawn by a device is 15 mA, find the time in which the electric source will be…
An electric source can supply a charge of $\displaystyle 750$ coulomb. If the current drawn by a device is $\displaystyle 15$ mA, find the time in which the electric source will be discharged completely.
Marking-scheme solution
\(\displaystyle \mathrm{Q}=\mathrm{I} \times \mathrm{t} \Rightarrow \mathrm{t}=\frac{Q}{I}\)
\(\displaystyle \therefore \mathrm{t}=\frac{750}{\dfrac{15}{1000}}=\frac{750 X 1000}{15}=50000 \mathrm{~s}\)
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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.