A parallel-plate capacitor has a voltage of 391 V applied across its plates,then the voltage source is removed.What is the voltage across its plates if the space between them becomes filled with mica? (The dielectric constant for mica is 5.4 and for air is 1.0006. )

Question

Quizplus · Accepted Answer

When the dielectric is inserted, the voltage across the plates decreases by a factor equal to the dielectric constant. The new voltage is 391 V / 5.4 = 72.41 V, approximately 72 V.

A Parallel-Plate Capacitor Has a Voltage of 391 V Applied