A parallel plate capacitor C with plates of unit area and separation d is filled with a liquid of dielectric constant K = 2. The level of liquid is 
initially. Suppose the liquid level decreases at a constant speed V, the time constant as a function of time t is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Time constant = τ = RC
Let thickness of dielectric filled is x at time t.
C = 
= 
C = 
∴ 
τ = 
A = 1 K = 2
τ = 
= 
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