4 cm2 the amount of charge inside a cylindrical wire of length L with resistivity ρ of cross-section It changes depending on time as q (t) = 3t2 - 2t + 4 (C). a) Calculate the amount of current flowing through the cross section of the wire at time t = 2 s. b) Find the current density J at time t = 3 s.
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4 cm2
the amount of charge inside a cylindrical wire of length L with resistivity ρ of cross-section
It changes depending on time as q (t) = 3t2 - 2t + 4 (C).
a) Calculate the amount of current flowing through the cross section of the wire at time t = 2 s.
b) Find the current density J at time t = 3 s.
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