The figure below shows a collection of wires. The currents at the numbered points are: I1 = 2.4 mA right; I2 = 3.6 mA down; I3 = 0.60 mA right; I4 = 4.0 mA up; and I5 = 1.6 mA up.
http://i.imgur.com/SCyljHG.png
a. What is the current at point A (size and direction)?

b. What is the current at point B (size and direction)?

Question

The figure below shows a collection of wires. The currents at the numbered points are: I1 = 2.4 mA right; I2 = 3.6 mA down; I3 = 0.60 mA right; I4 = 4.0 mA up; and I5 = 1.6 mA up.
http://i.imgur.com/SCyljHG.png
a. What is the current at point A (size and direction)?

b. What is the current at point B (size and direction)?

anonymous · Answer

interesting question i must say

noelgreco · Answer

Kirchoff's First Law states:

At any node (junction) in an electrical circuit, the sum of currents flowing into that node is equal to the sum of currents flowing out of that node, or:

    The algebraic sum of currents in a network of conductors meeting at a point is zero.