The quantity of charge q in coulombs that has passed


The quantity of charge q (in coulombs) that has passed through a surface of area 1.92 cm2 varies with time according to the equation q = 4t3 + 5t + 6, where t is in seconds.

(a) What is the instantaneous current through the surface at t = 1.02 s?

A

(b) What is the value of the current density?

kA/m2

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Physics: The quantity of charge q in coulombs that has passed
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