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 2.05 cm2 varies with time according to the equation q = 6t3 + 7t + 6, where t is in seconds.

(a) What is the instantaneous current through the surface at t = 0.950 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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