For the last question I posted, the Key says the answer is 0.50 nF.
How do they get that answer?
P.S. I have Teflon being 2.1 and paper being 3.5
Since the potential between point a and b is the potential between the plates, when a capacitor is half filled with a different dielectric, then we can describe the system as two capacitors linked in a parallel. Both "new" capacitors have half the original plate area.
The first capacitor C1 is filled with air (air=1), while the other capacitor C2 is filled with paper (paper=1)
Therefore, the capacitors values are:
Since these capacitors are linked in parallel the total capacitance is the sum of the two capacitors.
All is left now is to plug in the numbers, making sure all the units agree:
Therefore:© BrainMass Inc. brainmass.com December 24, 2021, 5:12 pm ad1c9bdddf
Since the potential between point a and b is the potential between the plates, when a capacitor is half filled with a different ...
The potentials between the different dielectrics are determined. A system of two capacitors are provided.