AP EAMCET · PHYSICS · Current Electricity
Charge 'Q' (in coulomb) flowing through a conductor in terms of time 't' (in second) is given by the equation \(Q=3 t^2+t\). The current in the conductor at time \(\mathrm{t}=3 \mathrm{~s}\) is
- A 3A
- B 7A
- C 19A
- D 21A
Answer & Solution
Correct Answer
(C) 19A
Step-by-step Solution
Detailed explanation
\(I = \frac{dQ}{dt}\) \(I = \frac{d}{dt}(3t^2+t) = 6t+1\) At \(t=3 \text{ s}\), \(I = 6(3)+1 = 18+1 = 19 \text{ A}\)
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