CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Figure 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.
(a) Calculate the capacitance and the rate of change of potential difference between the plates.
(b)
Obtain the displacement current across the plates.
(c)
Is
Kirchhoffs first rule (junction rule) valid at each plate of
the capacitor Explain.
420505_a78eebb206674efe8018c99f1db73431.png

Open in App
Solution

(a)
C=ε0A/d=80.1pF
dQdt=CdVdt
dVdt=0.1580.1×1012=1.87×109Vs1

(b)

The displacement current across the plate is same as the conduction current.

Hence, the displacement current , Id=0.15 A

(c)

Yes, Kirchhoff's first rule is valid at each plate of the capacitor provided that we take the sum of conduction and displacement for the current.


flag
Suggest Corrections
thumbs-up
2
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Ampere's Law
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon