| Assertion (A): Two parallel metal plates having charge +Q and -Q are facing at a distance between them. The plates are now immersed in kerosene oil and the electric potential between the plates decreases. |
| Reason (R): Dielectric constant of kerosene oil is less than 1. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is fake and R is True
Correct Answer: C
Solution :
| Option [c] is correct. |
| Explanation: Electric field for parallel plate capacitor in vacuum = \[\operatorname{E}=\sigma /{{\varepsilon }_{0}}\] |
| Electric field in dielectric =\[\operatorname{E}'=\sigma /K{{\varepsilon }_{0}}\] |
| Since the value of K for Kerosene oil is greater than 1, then E'< E. Hence the assertion is true. |
| Dielectric constant of Kerosene oil is greater than 1. Hence the reason is false. |
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