Resistance Formulas
DIELECTRIC CONSTANTS
In parallel
|
Two resistors in parallel |
|
Dielectric K Value
|
Air (at atmospheric pressure)
.................... Bakelite .................................................... Beeswax .................................................. Cambric (varnished) ................................. Fibre (Red) .............................................. Glass (window or flint) .............................. Gutta Percha ............................................ Mica ........................................................ Paraffin (solid) .......................................... Paraffin Coated Paper .............................. Porcelain .................................................. Pyrex ....................................................... Quartz ...................................................... Rubber ..................................................... Slate ......................................................... Wood (very dry) ....................................... |
1.0 5.0 3.0 4.0 5.0 8.0 4.0 6.0 2.5 3.5 6.0 4.5 5.0 3.0 7.0 5.0 |
depend upon quality or grade of material used, as
well as moisture content, temperature and frequency
characteristics of each
In series
|
Two capacitors in series |
|
where Q = the quantity stored in coulombs,
E = the potential impressed across the
capacitor in volts,
C = capacitance in farads.
In parallel
|
Two inductors in parallel |
|
Capacitor is Given by
where C = capacitance in mmfd.,
K = dielectric constant,
*S = area of one plate in square centimeters,
N = number of plates,
*d = thickness of the dielectric in centimeters
(same as the distance between plates).
*When S and d are given in inches, change
constant 0.0885 to 0.224. Answer will still be
in micromicrofarads.
In series with fields opposing
In parallel with fields aiding
In parallel with fields opposing
