Two parallel plate capacitors of capacitances C and 2C are connected in parallel and charged to a potential difference V. The battery is then disconnected and the region between the plates of the capacitor C is completely filled with a material of dielectric constant K. The potential differences across the capacitors now becomes...........

Options

A. increases
B. decreases
C. remains same
D. first increases and after some time becomes same as before

Answer

b

Explanation

In the given passage we should known that potential difference between the plates of P remains constant whereas charge stored in Q will remain constant. All answer are to be obtained keeping these things in mind.