Week 5- Electricity Etc Flashcards
Coulomb’s law states that like charges __ each other
Repel
1 coulomb = ___ electrons
1.6022210^19
A volt is like the “__” or gradient of charges that could potentially flow
Pressure
Electrical current is the __ of flow through a conductor
Rate
Current (capital I) is measured in __
Amperes
An ampere is the flow of 1 __ per second
Coulomb
Ohm’s law measures __ to electrical flow
Resistance
Voltage = current in amps x resistance in ohms
V= I x R
1 hz equals __ cycle per second
1
In AC circuits, resistance is called __ and is the total of all forces that impede electrical flow.
Impedance
Macroshock vs microshock
Macroshock = large current = harm/death, 100-2500 milli amps
Microshock = electrically susceptible patient = external conduit in direct contact with heart = may cause vfib, min. of 50 micro amps
There are two types of grounding, power and equipment. They are not mutually __
Exclusive
Utility companies provide __ power to homes
Grounded
What is the third wire for?
Low resistance pathway through which current can flow to ground
Can you still get a shock from grounded equipment and grounded wires?
Yes, but the wire has less resistance so only part of the current will pass through the person
The power supplied to OR is __ by using an isolation transformer, and protects from __shock
Ungrounded
Macroshock
What are the only two things grounded in the OR according to Baresh’s newest material?
Note- the primary power supply is grounded but the secondary side of the transformer is ungrounded.
The patient
The floor
Is the electrical equipment in the OR grounded or isolated? How is it monitored?
Isolated by isolation transformers
Monitored by line isolation transformer
The line isolation monitor meters the amount of __ plugged into the isolated power system
Leakage
If a line isolation monitor reads between 2-5 mA it most likely means__
Too much equipment plugged in
If the line isolation monitor reads >5 mA it is likely a __
Faulty piece of equipment
Can the line isolation monitor protect from microshock?
No
