Flashcards in Modalities Ch. 16 Deck (62)

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1

## electricity

### form of energy that is produces by the accumulation and/or the movement of electrons

2

## requirements for electron flow

###
electrons

path or conductor

force to push electrons

3

## types of electricity

###
static

current

4

## static

###
frictional

-two objects rubbing together

-electrons transferred from one object to another

5

## currnet

###
electrons traveling along a conductor

-can be direct or alternating

6

## measures of electrical charge

###
coulomb (Q)

amperage (A)

voltage (V)

resistance (R)

-ohm

--material

--length of circuit

--cross sectional area

--temperature

7

## coulomb

###
measure of electrical charge

quantity of electrons

6.25 x 10^18

8

##
amperage

-A=

###
speed at which a current is flowing

-1 coulomb past a point in 1 second

9

##
voltage

-in modalities

###
electromotive force

difference of energy at one point to another

in modalities

-want it to be as low as possible while still achieving the desired effects

10

##
resistance

###
1 amp past 1 ohm

ability of a substance to oppose a current

11

## ohn

### measure of the resistance to electrons

12

## resistance factors

###
material

length of circuit

cross sectional area

temperature

13

## material in body

###
blood and nerves have lower resistance (more electrons)

skin and bones have higher resistance

14

## length of circuit

### the shorter the circuit, the less resistance

15

## cross sectional area

### the larger the area the less resistance

16

## temperature

###
increased temperature equals increased flow of electrons

-decreases resistance

17

## water-electricity flow analogy

### table in book

18

## Ohm's Law

###
current (amps)= voltage/resistance

-A = V/R

volts = current x resistance

resistance = voltage/current

19

## current types

###
direct current

alternating current

pulsed current

20

##
direct

-alternate name

###
continuous flow of electrons in one direction

-pulse greater than one second

galvanic current

21

## alternating current

###
continuous flow of electrons in alternating directions

-IFC is a series of alternating current coming together

22

## pulsed current

### interruption in flow

23

## pulse and cycle characteristics

###
pulse named by number of phases

-monophasic

-biphasic

-polyphasic

24

## monophasic

###
one phase

current flows in one direction only

25

## biphasic

###
two phases

current flows in both directions

26

## polyphasic

### multiple phases

27

## quantitative characteristics

###
amplitude

-distance from baseline to top of wave

28

## peak vs. average amplitude

###
peak

-the longest distance

average

-average of all the amplitudes

29

## pulse duration

###
duration of one pulse

-made up of phases

30