## Electronics
## Kirchhoff's Rules**Current Rule or Junction Rule**(conservation of charge)- The algebraic sum of the currents entering any junction must equal the sum of the currents leaving that junction.
- Therefore, in a series circuit the current is the same everywhere.
**Voltage Rule or Loop Rule**(conservation of energy)- The algebraic sum of the potential differences (voltage drops) around a closed conducting loop must equal zero.
- Therefore, components connected in parallel have the same voltage across them.
## Ohm's Lawwhere voltage is in ohms and current R is in amperes.I## Joule's Lawwhere power is in volts, resistance V is in ohms and current R is in amperes.I## Thévenin's TheoremAny two-terminal network of resistors and voltage sources is equivalent to a single resistor in series with a single voltage source. ## Definitions1 ampere = 1 coulomb/second 1 coulomb = 1 ampere · second 1 farad = 1 coulomb/volt 1 joule = 1 newton · meter 1 newton = 1 kg · meter/second 1 ohm = 1 volt/ampere 1 volt = 1 joule/coulomb 1 Watt = 1 joule/second ## Symbols, Dimensions and Units of Physical Quantities
Index | Technical Notes ]Page author: Dawn Rorvik (rorvikd@evergreen.edu) Last modified: 05/20/2003 |