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1. (c) Figure 8.6 shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15A. Is Kirchhoff’s first rule (junction rule) valid at each plate of the capacitor? Explain.
Answers (1)
Yes, Kirchoff's First rule (junction rule) is valid at each plate of the capacitor. Where the law States that " At a junction in an electrical circuit, the sum of currents flowing into the junction is equal to the sum of currents flowing out of the junction." So, Kirchhoff’s first rule is valid at each plate of the capacitor provided that we consider the current to be the sum of both conduction and displacement currents.
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