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Question 16.
00:02
We are given a diagram of an electric circuit here, wherein the branch currents are shown, and we are to determine the current that flows through amateur a or the reading of amateur a.
00:17
We are given four choices here.
00:19
And to answer the question, of course, we will apply, excuse me, kirchof's junction rule.
00:25
So it says here that at any junction, the algebraic sum of the current, is equivalent to zero.
00:33
Positive current if it's into the junction and negative current if it's away from the junction.
00:38
Okay.
00:39
So we label the junction here as junction o and the current in this branch as i.
00:51
So applying kirkov junction rule.
00:54
So we'd say that at junction o, at junction o, the algebraic sum of the current is equivalent to zero.
01:05
We have 15 going into junction o, so that's positive 15...