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Standard XII

Physics

Introducing Epsilon

1: The dielec...

Question

(1): The dielectric medium between the plates of a parallel plate capacitor lowers the potential difference between the plates without a battery.
(2): The maximum electric field that a dielectric can withstand without causing it to break down is dielectric strength.

Both 1 and 2 are true, 2 is not correct explanation of 1

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Both 1 and 2 are true, 2 is correct explanation of 1.

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1 is false, 2 is true

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1 is true, 2 is false

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Solution

The correct option is A Both 1 and 2 are true, 2 is not correct explanation of 1
Consider a capacitor with charge density $σ$ .
The potential between its two plates is given by $σ d / ϵ_{0}$
When a dielectric is inserted, the electric field inside the capacitor decrease decreasing the potential between the two plates of capacitor.
However, this is nothing to the dielectric strength of the dielectric.

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Similar questions

Statement-I : A charged plane parallel plate capacitor has half interplanar region (I) filled with dielectric slab. The other half region II has air. Then, the magnitude of net electric field in region I is less than that in region II.

Statement-II : In a dielectric medium, induced (or polarized) charges tend to reduce the electric field.

Q. A parallel plate capacitor with a dielectric slab of dielectric constant

3

, filling the space between the plates, is charged to a potential

V

. The battery is then disconnected and the dielectric slab is withdrawn. It is then replaced by another dielectric slab of dielectric constant

2

. If the energies stored in the capacitor before and after the dielectric slab is changed are

E_{1}

and

E_{2}

, then

E_{1} / E_{2}

is:

Choose the correct option.

Statement $1 : (p \land \sim q) \land (\sim p \land q)$ is a fallacy.

Statement $2 : (p \Rightarrow q) \Leftrightarrow (\sim q \Rightarrow\sim p)$ is a tautology.

Q. A capacitor of capacitance

2 μ F

is charged with a

10 V

battery. Now the battery is disconnected and a dielectric of dielectric constant

K = 4

is inserted between the plates. What is the potential difference between the plates of the capacitor ?

Q. The capacitance of a parallel plate capacitor in air is

2 μ F

. If a dielectric medium is placed between the plates then the potential difference reduces to

\frac{1}{6}

of the original value. The dielectric constant of the medium is :

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(1): The dielectric medium between the plates of a parallel plate capacitor lowers the potential difference between the plates without a battery. (2): The maximum electric field that a dielectric can withstand without causing it to break down is dielectric strength.

(1): The dielectric medium between the plates of a parallel plate capacitor lowers the potential difference between the plates without a battery.
(2): The maximum electric field that a dielectric can withstand without causing it to break down is dielectric strength.