Directions: (36-40) |
Dielectric Slab |
A dielectric slab is a substance which does not allow the flow of charges through it but permits them, to exert electrostatic forces on one another. |
When a dielectric slab is placed between the plates, the field \[{{E}_{0}}\]polarises the dielectric. This induces charge \[-{{Q}_{p}}\] on the upper surface and \[+{{Q}_{p}}\]on the lower surface of the dielectric. These induced charges set up a field \[{{E}_{p}}\] inside the dielectric in the opposite direction of \[{{\overrightarrow{E}}_{0}}\] as shown. |
A) 10
B) 20
C) 50
D) 100
Correct Answer: B
Solution :
\[k=\frac{Capacitance\text{ }with\text{ }dielectric}{Capacitance\text{ }without\text{ }dielectric}\] \[=\frac{80\mu F}{4\mu F}=20\]You need to login to perform this action.
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