A parallel-plate capacitor with plate area A and separation between the plates d, is charged by a constant current i. Consider a plane surface of area A/2 parallel to the plates and drawn symmetrically between the plates. Find the displacement current through this area.
A
i
B
C
2i
D
zero
Text Solution
Verified by ExpertsThe correct answer is:
B
Suppose the charge on the capacitor at time t is Q. The electric field between the plates of the capacitor is E = 
. The flux through the area considered is
Φ E = 
. 
= 
.
The displacemet current is i d = ε 0 
= ε 0 
= 
.
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