Question

Assertion :A dielectric decreases the electric field inside the capacitor. Reason: When dielectric is placed in a capacitor (assume a 2V battery is connected to capacitor) then small amount of current is produced in reverse direction immediately after the replacement.

• 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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

When a dielectric is used, the electric field inside the capacitor decreases. It becomes $[\frac{E_0}{k}=E]$, where $E_0=$ electric field when air was used, and due to dielectric, induced charges are produced within the dielectric slab due to polarization. As a result small amount of current flows in a reverse direction. So, both the statements given are correct, but reason is not correct explanation for the assertion.