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Charge through a cross-section of a cond...

Charge through a cross-section of a conductor is given by `Q = 5t^(2) - 2t` coulomb . Find the average current through the conductor in the interval `t_(1) = 2s` to `t_(2) = 4s`
(1) 14s (2) 28 A
(3) 56A (4) 7A

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Answer (2)
Acerage current `l_(av) = ( DeltaQ)/(Deltat) = (Q_(2)- Q_(1))/(t_(2)-t_(1))`
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