Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Two parallel plate air capacitors each of capacitance C were connected in series to a battery with e.m.f. ε . Then one of the capacitors was filled up with uniform dielectric with relative permittivity k. How many times did the electric field strength in that capacitor decrease? What amount of charge flows through the battery?
Text Solution
Verified by ExpertsThe correct answer is:
1
(1 + k), Δ q = 
Cε 
Sol.
V 1 = 
= 
⇒ E 1 = 
= 
⇒ E = 
= 
E 1 = 
E
⇒ 
(1 + k) time decrease
⇒ q = Q 1 – Q = 
= 
⇒ Δ q = 
Cε 
.
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