Multiple Choice
The current in a wire varies with time according to the relation
I = 40 cos(10 t)
Where I is in amperes and t is in seconds. The number of coulombs that pass a cross section of the wire in the time interval between t = 0 and t = 1/20 s is
A) 2
B) 4
C) 40
D) 4
E) zero
Correct Answer:

Verified
Correct Answer:
Verified
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