Question

How can charge be stored on glass (a dielectric)

Answer 1

REALLY TRICKY QUESTION........

Answer 2

i guess charge exists as dipoles in dielectrics

Answer 3

Even though glass is a good insulator, charges can still move (it can still have static electricity, for instance). In a dielectric in a capacitor, charges separate with positive charges going to the negative plate and negative charges going to the positive plate as to decrease the electric field between the capacitor and thus increase the capacitance.

Answer 4

so to store charge the glass needs to be in a circuit with electron-motive-force applied?

Answer 5

Not necessarily, if the capacitor is charged, there is an imbalance of electrons distributed between the plates of the capacitor with the negative side having a surplus when compared to the positive plate or side. This imbalance creates the charge, and an electric field is set up between the plates thru the glass (electric fields can exist in a vacuum or space etc.) If the leads are switched open with the imbalance the capacitor will remain charged as long as there is no leakage of electrons. Just wait until you study waveguide theory and propagation of electromagnetic fields, you will surely have to use your imagination.

Answer 6

at what of level is waveguide theory? @radar

Answer 7

If you are planning to study something like Electrical Engineering in the radio frequency (RF) field, you may encounter. I was submitted to this stuff as a technician (more of a practical level while going through Basic Radar at the FAA Academy located in Oklahoma City, OK. It was a mindblowing experience the components used in transmission of RF at the microwave frequencies.