question_answer 1)

Figure shows a capacitor made of two circularplates each of radius 12 cm and separated by5.0 cm. The capacitor is being charged by anexternal source (not shown in figure). Thecharging current is constant and equal to0.15 A. (a) Calculate the capacitance and the rate ofchange of potential difference between theplates. (b) Obtain the displacement current acrossthe plates. (c) Is Kirchhoff?s first rule valid at eachplate ofthe capacitor? Explain.

Answer:

(a) Using we get Now using we get or (b) Displacement Current (c) Yes. Because conduction currententering one plate is equal to thedisplacement current leaving that plate.