Question

on reducing the potential across a capacitor it's capacitance ______.​

Answer 1

Answer:

The strength of electric field is reduced due to presence of dielectric and if the total charge on the plates is kept constant then the potential difference is reduced across the capacitor plates. In this way dielectric increases the capacitance of capacitor

Answer 2

The capacitance of the capacitor will not change even after reducing the potential across the capacitor.

We know that:-

Q ∝ V

charge acquired by the capacitor is proportional to the potential difference applied

Now the Proportionality sign can be removed by putting the constant of proportionality 'C' for a given capacitor

Now

Q = CV

C can be written as:-

C= Q/V

Because Q is generated by V it cannot affect C.

Hence the potential across the capacitor will remain the same.