| Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
| Assertion (A): When a dielectric medium is filled between the plates of a condenser, its capacitance increases. |
| Reason (R): The dielectric medium reduces the potential difference between the plates of the condenser. |
A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
B) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
C) Assertion (A) is true but Reason (R) is false
D) Assertion (A) is false and Reason (R) is also false
Correct Answer: A
Solution :
(a) The dielectric molecules are polarised, producing an opposite electric field. Thus the effective electric field am hence the potential difference between the plates is reduce and consequently the capacitance is increased \[\left( \because \,C=Q/V \right)\].
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