The current in a wire varies with time according to the relation
I = 40 $\pi$ cos(10 $\pi$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 $\pi$
B) 4 $\pi$
C) 40 $\pi$
D) 4
E) zero

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The Answer of The current in a wire varies with time according to the relation
I = 40 $\pi$ cos(10 $\pi$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 $\pi$
B) 4 $\pi$
C) 40 $\pi$
D) 4
E) zero

The Current in a Wire Varies with Time According to the Relation