How Do I Calculate Kirchoff's Law?
- 1). Add the currents entering the node in question, including the unknown current.
- 2). Add the currents exiting the node in question.
- 3). The sums from Steps 1 and 2 should be equal.
- 4). Use simple arithmetic to determine the unknown current's magnitude. If it is a positive number, then it is an entering current, as assumed. If it is a negative number, then it is actually an exiting current.
- 1). Add all voltages around the closed loop, including the unknown voltage.
- 2). Set the sum from Step 1 equal to zero.
- 3). Use simple arithmetic to determine the unknown voltage magnitude.