If Qr = 4 C of charge moves to the right in tr = 4.0 s while Ql = -1525 mC of charge moves to the left in t = 2.2 s , what is the net current to the right?

The answer to the question is

The net current to the right = 1.639 A

Explanation:

Current flow direction is measured in terms of the direction of the positive charges, however the equivalent flow of negatively charge particles (electrons) in the opposite direction is called electric current flow

Here the given variables are

Qr = 4 C of charge migrate to the right

tr = time of Qr migration to the right

Ql = -1525 mC charge migrate to the left

tl = time of displacement of charge tl

The unit of current is the Ampere A and 1 A = 1 C/s

Therefore the current flow to the right is

ir = dQr/dtr = (4 C)/(4.0 s) =  1 A

The charge Ql = -1525 mC = -1.525 C moves the left, which is equivalent to current of the same magnitude to the right  hence

il = dQl/dtl = (-1.525 C)/(2.2 s) = - 0.693 A

By the definition of current flow, the net current to the right = 1 A - (-0.693 ) = 1.639 A

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