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Resonance
RESONANCE is a condition that exists in a circuit when inductance, capacitance, and the applied
frequency are such that inductive reactance and capacitive reactance cancel each other.
Formula for resonant frequency (fr):
NOTE: The formula for resonance is the same for series or parallel circuits when XL = X
C.
Transistors
Semiconductor devices that have three or more elements are called TRANSISTORS. The term is
derived from TRANSfer and resISTOR. This term describes the operation of the transistor — the transfer
of an input signal current from a low-resistance circuit to a high-resistance circuit.
Some transistor formulas are shown below.
Transistor total current:
