Imagine a parallel-plate capacitor with a capacitance of 50…

Imagine a parallel-plate capacitor with a capacitance of 50 μF.  This capacitor is connected to a 10 V battery. Suppose we now decrease the separation between the plates of the capacitor.  Which one of the following statements about the capacitor is FALSE?  

In the following figure two identical conductive neutral bal…

In the following figure two identical conductive neutral balls on an insulating stand, named as X and Y,  are initially attached together. An insulator with excess positive charge is brought close to the balls. Then, the right sphere is moved away from the left one. What is the final charge if the two spheres?