Question

A parallel plate capacitor is charged to a certain voltage. Now, if the dielectric material (with dielectric constant k) is removed then the

• A. capacitance increases by a factor of k
• B. electric field reduces by a factor k
• C. voltage across the capacitor decreases by a factor k
• D. none of these

Answer 1

The correct option is D none of these

As the capacitor is charged by using cell so potential as well as filed between the plates become constant.
For removing dielectric the capacitance becomes $C/k$. Thus capacitance decreases by a factor of k.