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Grade 12Electric Current

Two identical parallel plate capacitors are placed in series and connected to a constant voltage source of V volt. If one of the capacitors is completely immersed in a liquid with dielectric constant k, the potential difference between the plates of other capacitor will change to ?

yash lohar

9 Years agoGrade 12

1 Answer

deepak

9 Years ago

if the capacitors are connected then before the introduction of the dielectric the voltage of each of them is V/2

by the formula for capacitance,

Q=CV

since the capacitors are connected in series therefore the charges on them must be a constant,

therefore C is inversely propotional to V ….….1

on introduction of a dielectric liq. of constant k, the capacitance of immersed capacitor becomes kC

then the voltage(potentiall difference between the plates) on that capacitor wil become V/(1+k) ….….by 1

then the voltage on the second capacitor will become V−V/(1+k)

hope this was useful

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