Kirchhoff first law is considered one of the most asked concept.
17 Questions around this concept.
The Kirchhoff’s first law $\left(\sum i=0\right)$ and second law $\left(\sum i R=\sum E\right)$ where the symbols have their usual meanings, are respectively based on
In the given circuit diagram, the currents, I1 = -0.3 A, I4 = 0.8 A and I5 = 0.4 A, are flowing as shown. The currents I2 , I3 and I6 ,respectively, are :
The electric potential at O is

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If $i_t=3 \sin t$ and $i_2=4 \cos t$, then $i_3$ is:
Kirchoff's first law
In a circuit, at any junction, the sum of the currents entering the junction must equal the sum of the currents leaving the junction. This law is also known as Junction rule or current law (KCL)
$\sum i=0$

$i_1+i_3=i_2+i_4$
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