Final answer:
To verify Kirchhoff's junction rule in a circuit, measure the currents at a junction where they converge or diverge. For example, at point 'a' apply the equation I1 = I2 + I3, to ensure the sum of currents entering equals the sum leaving the junction.
Step-by-step explanation:
To confirm Kirchhoff's junction rule, you need to measure currents entering and leaving a junction in a circuit. The junction rule states that the total current entering a junction must equal the total current leaving the junction. In other words, the sum of currents into the junction is zero when considering currents entering as positive and currents leaving as negative.
Kirchhoff's first or junction rule can be applied using currents I1, I2, and I3 at a particular junction point in the circuit. According to the information provided, applying the junction rule at point a would give the equation I1 = I2 + I3. This means, you should measure the currents at the point where they either converge or diverge, which would typically be the point labeled a in the circuit diagram.If the directions of I2 and I3 are assumed to be towards the junction and I1 away from it, measuring the currents at points entering and leaving the junction allows one to confirm the junction rule by ensuring that I1 is indeed the sum of I2 and I3.