The quantity of charge Q in coulombs (C) that has passed through a point in a wire up to timet (measured in seconds) is given by Q(t) = t3- 2t2 + 7t + 4.[The unit of current is an ampere 1 A = 1 C/s.)(a) Find the current (in A) when t = 0.4 s.A(b) Find the current (in A) when t = 1 s.At what time (in s) is the current the lowest?t =

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The quantity of charge Q in coulombs (C) that has passed through a point in a wire up to time t (measured in seconds) is given by Q(t) = t- 2t2 + 7t + 4. [The unit of current is an ampere 1 A = 1 C/s.) (a) Find the current (in A) when t = 0.4 s. A (b) Find the current (in A) when t = 1 s. A. At what time (in s) is the current the lowest?

The quantity of charge Q in coulombs (C) that has passed through a point in a wire up to time t (measured in seconds) is given by Q(t) = t- 2t2 + 7t + 4. [The unit of current is an ampere 1 A = 1 C/s.) (a) Find the current (in A) when t = 0.4 s. A (b) Find the current (in A) when t = 1 s. A. At what time (in s) is the current the lowest?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 65PQ

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