Question

Assertion :The total charge stored in a capacitor is zero. Reason: The field just outside the capacitor is $\frac{\sigma }{{\epsilon }_0}$.($\sigma$ is the charge density)

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

The net charge on either plate of the capacitor is equal and opposite to the net charge stored in a capacitor $=$ zero. The assertion is in dead correct. However, if we imagine a surface enclosing the plates of the capacitor, the surface will not hold an ant net charge and according to Gauss theorem, the flux will be zero. Thus the field is zero outside the capacitor. Hence reason is false.

So, Assertion is the true reason that is false.