The amount of charge Q passing in time \( t \) through a \( \mathrm...

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The amount of charge Q passing in time \( t \) through a
\( \mathrm{P} \)
cross-section of a wire is \( Q=5 t^{2}+3 t+1 \). The value
W
of current at time \( t=5 \mathrm{~s} \) is
(1) \( 9 \mathrm{~A} \)
(2) \( 49 \mathrm{~A} \)
(3) \( 53 \mathrm{~A} \)
(4) None of these
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