Electricity

Question 1

Defined as the effects produced by moving charges

Answer 1

Electricity

Question 2

Positively charged contain _______ prótons than electrons

Answer 2

More

Question 3

Negatively charged contain _______ prótons than electrons

Answer 3

Less

Question 4

Fundamental principle of charge interaction

Answer 4

A positively charged object will attract a negatively charged object

Question 5

If the charge is let loose, it would move (_____) and if we hold it still it has ______

Answer 5

Kinetic, potential energy

Question 6

The unit of electrical potential

Answer 6

Volt

Question 7

Defined as the amount of charge flowing per unit of time

Answer 7

Current (I)

Question 8

An ______ of current corresponds to 1 coulomb of charge per second

Answer 8

Amp

Question 9

Materials I which charges can easily move are

Answer 9

Conductors

Question 10

Most are no metals and generally are not good conductors except graphite

Answer 10

Insulators

Question 11

To be a good ______, electrons must be able to move easily from one atom to the next

Answer 11

Conductor

Question 12

The energy required to push electrons through a material

Answer 12

Resistance

Question 13

Resistance is measured in

Answer 13

Ohms

Question 14

Reciprocal or resistance

Answer 14

Conductance

Question 15

The closed path through a charge flows is

Answer 15

Electric circuit

Question 16

An electrical circuit in which the current flows in one direction only

Answer 16

Direct current (DC)

Question 17

An electrical circuit in which the current reverses its direction in a periodic fashion

Answer 17

Alternating current (AC)

Question 18

A situation in a circuit where the normal resistance of the circuit is bypassed by a low resistance path resulting in a large current

Answer 18

Short circuit

Question 19

The product of volts and amps

Answer 19

Electrical power

Question 20

Power is measured in

Answer 20

Watts

Question 21

Power =

Answer 21

Energy/time

Question 22

Energy =

Answer 22

Power x time

Question 23

Large amount of current conducted through a patients skin or other tissue. Injury depends on amount and duration of exposure

Answer 23

Macro shock

Question 24

Delivery of small amounts of current directly to the heath. Very small currents can produce vfib

Answer 24

Microshock

Question 25

what provides a low resistance pathway for leakage current and constitutes the major source of protection against microshock in the electrically susceptible patient

Answer 25

the ground wire on a piece of equipment

Question 26

Never _______ touch an electrical device and a saline filled central venous pressure cath or external pacing wires

Answer 26

simultaneously (wear rubber gloves)

Question 27

macroshock accepted as max harmless current intensity

Answer 27

5mA

Question 28

macroshock threshold of preception

Answer 28

1mA

Question 29

microshock vfib

Answer 29

100microamp

Question 30

electric devices with one narrow prong and one wide prong

Answer 30

polarized plugs

Question 31

narrow prong is for

Answer 31

high potential

Question 32

wide prong is for

Answer 32

low potential

Question 33

Third prong ground plug if a high potential wire comes into contact with the case, the current will flow directly through _______, instead of through

Answer 33

the third prong instead of through your body

Question 34

GFCI

Answer 34

Ground fault circuit interrupter-used in circuits near water, interrupts current if leak present completely, not good for life saving devices in OR

Question 35

How are electrical systems isolated from the grounded electrical supply?

Answer 35

isolation transformers

Question 36

Rely on magnetic inductance to transfer a current from the grounded electrical system to an ungrounded secondary system without the two systems physically contacting each other

Answer 36

Isolation transformers

Question 37

Isolation tranformers have no direct connection to

Answer 37

ground which prevents shock

Question 38

if live wires make contact with a ground, the ungrounded system now becomes a grounded system known as a

Answer 38

fault

Question 39

Device that alarms when a fault in an ungrounded system occurs

Answer 39

line isolation monitor

Question 40

alarm set point for a line isolation monitor is usually between

Answer 40

2 and 5 mA

Question 41

If alarm is above 5mA

Answer 41

is likely true fault and unplugging each piece of equipment will identify the faulty piece and needs to be removed

Question 42

what does the line isolation monitor not provide protection from?

Answer 42

microshock