The current in a conductor is expressed as $I = 3t^2 + 4t^3$,where $I$ is in Ampere and $t$ is in second. The amount of electric charge that flows through a section of the conductor during $t = 1 \ s$ to $t = 2 \ s$ is . . . . . . $C$.
- A$22$
- B$30$
- C$35$
- D$40$
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