A capacitor has a vacuum in the space between the conductor plates. If you double the charge on each conductor, what happens to the capacitance?
When charge is given to a capacitor the potential difference across its plates rises. As the more and more charge is given, its potential increases accordingly. If a charge Q is given to the capacitor so that its potential rises through V, then it has been found that charge Q stored in it is directly proportional to potential difference V across the plates of the capacitor. So,
Q V
or
Q = CV
where C is a proportionality constant, called the...
