| ASSERTION: If a conducting medium is placed between two charges, then electric force between them becomes zero. |
| REASON: Reduction in a force due to introduced material is inversely proportional to its dielectric constant. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
The dielectric constant of any material is \[K=\frac{{{E}_{0}}}{E}=\frac{\frac{{{F}_{0}}}{q}}{\frac{F}{q}}=\frac{{{F}_{0}}}{F}\] \[\Rightarrow \,F=\frac{{{F}_{0}}}{K}\]where \[{{F}_{0}}\]is force when conductor is not present between the charge. F is a force after introduction of conductor between charges. Since dielectric constant of a conducting medium is infinity therefore F = 0.
You need to login to perform this action.
You will be redirected in
3 sec
