SSE JE Electrical Engineering 28 Oct 2020 Shift 1 Papers

Question : 175 of 200

Marks: +1, -0

Determine the total charge entering a terminal between t = 1 s and t = 2 s, if the current passing the terminal is

(3t^2 - t) \A

Solution:

Current passing the terminal

= (3t^2 - t) \A

Charge

=∫↙{1}↖{2}(3 t^{2}-t) d t

=[t^2-t^2/2]^2_1

=(8-1)-{1}/{2}(4-1)

=5.5 \C

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