Assertion : The electrostatic force between the plates of a charg… - Vidyadip

MCQ

Assertion : The electrostatic force between the plates of a charged isolated capacitor decreases when dielectric fills whole space between plates.

Reason : The electric field between the plates of a charged isolated capacitance increases when dielectric fills whole space between plates.

A
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
C
If Assertion is correct but Reason is incorrect.
✓
If Assertion is incorrect and Reason is correct.

✓

Answer

Correct option: D.

If Assertion is incorrect and Reason is correct.

d
For isolated capacitor $Q =$ constant, $F =$ constant.

But $E\, = \,\frac{\sigma }{{K\,{ \in _0}}}$, hence $E$ decreases.

$\therefore $ Assertion is incorrect and Reason is correct.

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