Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: A parallel plate capacitor is connected across battery through a key. A dielectric slab of dielectric constant K is introduced between the plates. The energy which is stored becomes K times. Reason: The surface density of charge on the plate remains constant or unchanged.A) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: C
Solution :
If a dielectric slab of dielectric constant K is filled in between the plates of a condenser while charging it, the potential difference between the plates does not change but the capacity becomes K times, therefore \[\mu F\] \[\Omega \] Energy stored in the capacitor \[\frac{1}{9}A\] \[\frac{1}{0.9}A\] \[I\] \[I=2\] Thus, energy stored becomes K times. Surface charge density \[I\] \[I\]
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