Electrical Terminology Flashcards
(34 cards)
The flow of electrons from an electron source
Electrical current
A material that opposes current flow
Resistor
A device that stores electrical energy
Capacitor
Opposition of biological tissues to the flow of electrical current
Impedence
Flow of current in one direction (positive or negative)
Direct current
Flow of current in One direction then in the other (bidirectional)
Alternating current
Synonymous with direct current
Monophasic
Synonymous with alternating current
Biphasic
Current flow in one direction
Phase
Time period from beginning to end of one phase (leave isoelectric line until it returns)
Phase duration
Time between phases (interphase interval)
Interphase duration
Time from isoelectric line until maximum amplitude
Phase rise time
Time from maximum amplitude until back at isoelectric line
Phase decay time
Equal to phase duration for DC current and 2x phase duration for ac current
Pulse duration
Series of successive pulses or cycles over a period of time
Burst
Time between beginning of 1st and end of last cycle or pulse
Burst duration
Time between two successive bursts
Interburst duration
The resulting current waveform when 2 or more sinusoidal waves intersect with each other
Beat
Number of times per second that a pulse, cycle, beat, or burst occurs
Frequency
Magnitude of current relative to the isoelectric line measured in amperes
Amplitude
Continuous series of pulses, cycles, bursts, or beats over time
Train
Ratio of on to off time expressed as a percentage
Duty cycle
Time period where current amplitude is increasing from zero to maximum
Ramp up
Time period where current amplitude is decreasing from maximum to zero
Ramp down
