1. What would be the effect on the capacitance of a particular capacitor if a sh

Question

1. What would be the effect on the capacitance of a particular capacitor if a sheet of glass is inserted between the capacitor plates? Assume there was air (dielectric constant 1) initially, then replaced with glass for which the dielectric constant is =3.5.

2. What would be the effect on the potential difference across a capacitor if a sheet of glass is inserted between the plates as in question #1? Assume that the charge remains the same.

3. Three capacitors of 2µF, 3µF and 5µF respectively are in parallel. This combination is then connected in series to a 10µF capacitor. What is the final equivalent capacitance?

Explanation / Answer

Here ,

1) initial capacitance is C

after inserting the dielectric ,

new capacitance = K * C

new capacitance = 3.5 * C

the new capacitance will become 3.5 times of initial capacitance

2)

as Q = C * V

for the chagre to be same

as the new capacitance = 3.5 * C

new voltage = V/3.5

the voltage becomes 1/3.5 times

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