1. A paper dielectric capacitor has two plates, each of effective csa 0.2 m2. If the capacitance is 50 nF calculate the thickness of the paper, given that its relative permittivity is 2.5.
2. A two plate capacitor has a value of 47 nF. If the plate area was doubled and the thickness of the dielectric was halved, what then would be the capacitance?