Find Change in Charge of Identical Capacitors w/ Dielectric Insertion

[Winzer]

Homework Statement

Two identical capacitors and of capacitance 1.20 F are connected in series across a FIXED total potential of 650 V. A dielectric slab of dielectric constant 3.70 can fill and is slowly inserted into that capacitor.
1. What is the change in charge, , on when the dielectric is added to ?
2. What is the change in charge, , on when the dielectric is added to ?

Homework Equations

$$C=C_{o}K$$

The Attempt at a Solution

Not quite sure.

 

[learningphysics]

Use Q = CV. which capacitor is the dielectric inserted into?

 

[Winzer]

the first one

 

[learningphysics]

the first one

What is the equivalent capacitance of the two series capacitors? Use the Q=CV relationship to get the charge on the equivalent capacitor...

The charge on each capacitor is the same as the charge you get above...