New Capacitance in Dielectric
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[Pb. PMT 2003]
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I have an insulator with dielectric constant k. If I place it in a region in vacuum with a field E, what is the induced field inside the dielectric?
−Ek
E(1−k)
E(1−1k)
E(1+1k)
Increase in the potential difference across the plate, reduction in stored energy, but no change in the charge on the plates
Reduction of charge on the plates and increase of potential difference
across the plates
Decrease in the potential difference across the plates, reduction in the stored energy, but no change in the charge on the plates
None of the above
The capacity of a parallel plate condenser is . When a glass plate is
placed between the plates of the conductor, its potential becomes 1/8thof
the original value. The value of dielectric constant will be
1.6
5
8
40
- Ck
- Ck2
- Ck2
- Ck
- 2ε0×10−2F
- ε0×10−2F
- None of these.
- 3ε0×10−2F
A capacitor is charged by using a battery which is then disconnected. A dielectric slab is then slipped between the plates, which results in:
None of the above
Reduction of charge on the plates and increase of potential across the plates
Decrease in the potential difference across the plates reduction in stored energy, but no change in the charge on the plates
Increase in the potential difference across the plates, reduction in stored energy, but no change in the charge on the plates
When a dielectric slab is introduced between the plates of an isolated charged capacitor, it
All of the above
Increase the capacitance of the capacitor
Decreases the electric filed between the plates
Decreases the amount of energy stored in the capacitor