A 2.0-nF parallel plate capacitor with a sheet of mylar (k = 3.1)filling the space between the plates is charged to a potential difference of 90 V and is then disconnected.What is the potential difference between the plates of the capacitor once the mylar is completely removed?

Question

Quizplus · Accepted Answer

When the mylar is removed, the capacitance decreases by a factor of the dielectric constant (k = 3.1). Since charge is conserved, the voltage increases by the same factor. Thus, the new voltage is 90 V * 3.1 = 279 V, approximately 2.8 * 10^2 V.

A 20-NF Parallel Plate Capacitor with a Sheet of Mylar (K