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Induced Charges

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what is the effect of dielectric on potential difference of the capacitor

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Q. An isolated capacitor with a capacitance

C

has a potential difference between the plates of

V

, which leaves on each plate a charge

Q

.
A dielectric is then pulled out from in-between the plates, what effect does this have on energy stored in the isolated capacitor?

Q. What will be the potential difference on the capacitor while placing dielectric between parallel plate capacitor in the following two cases:
1) If capacitor is already connected to some battery.
2) If the battery is switched off and after connecting dielectric again switched on. Explain with reason.

Q. A dielectric is inserted into a capacitor while the charge on it is kept constant. What happens to the potential difference and the stored energy?

Q. A potential difference of

Δ V

exists between two plates of a parallel-plate capacitor with capacitance C . A dielectric with a dielectric constant of k is then placed between the plates of the capacitor. What is the energy stored in the capacitor?

Q. A capacitor having a capacitance of 100 µF is charged to a potential difference of 50 V. (a) What is the magnitude of the charge on each plate? (b) The charging battery is disconnected and a dielectric of dielectric constant 2⋅5 is inserted. Calculate the new potential difference between the plates. (c) What charge would have produced this potential difference in absence of the dielectric slab. (d) Find the charge induced at a surface of the dielectric slab.

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