EG2 Ch.1 Flashcards
What is the first requirement for an electrical circuit?
A source of electrical pressure
What is the second requirement for an electrical circuit?
A conductor
Why are conductors necessary?
They transmit energy to the point where it will be used.
What condition must be present, in regards to conductors, for current to flow?
A complete path
A circuit with a complete path for power is known as what?
open circuit
What is the third and final requirement for an electrical circuit?
A load
What is a load?
A device that uses the electrical energy from the source
What do you call a circuit with no load or bypassed load?
short circuit
What is a characteristic of a short circuit?
low resistance
With little to no resistance, what happens to the amperage?
amps go up
When amps go up too much what happens to the conductor?
it melts
What are the two basic circuit types?
series and parallel
Which circuit type has only one path for current to flow?
series
What can you tell me about the current in a series circuit?
It is the same at any point in the circuit
Which circuit type has many paths for current to flow?
Parallel
Are power lines series or parallel circuits?
They are a combination of both
What can be said about anything connected directly between two points?
it is in series
Anything connected in series will have current flow through it unless what?
the resistance is high enough to prevent flow
What is one thing lineworkers should never do?
place themselves in series between two points of different potential
If viewed individually what type of circuit is line equipment?
Series
What happens to the current flow down line from a device?
current flow increases
In a series circuit, what is needed to operate properly?
a certain amount of current and voltage high enough to maintain proper current flow
What is voltage drop?
The amount of voltage needed to push a given current through a given amount of resistance
In a series circuit what happens to the voltage as it passes through each point of resistance?
the voltage drops
After current flows through the last load connected to in a series circuit, how much voltage is left?
none
How is the power delivery system a parallel circuit?
Lines branch out from substations and main line
How is the power delivery system a series circuit?
The equipment inline with the lines
T or F: The power delivery system is made of only one big parallel circuit.
False
At what point does the power delivery system branch off?
Where the voltage changes
Electrical values seen by the source, in a parallel circuit, are dependent on what?
By individual loads on the circuit
When the load increases on the line in a parallel circuit, what happens to the current and the source?
Current increases flow and the source provides more power
What is the source for a residence?
the meter
How much voltage is supplied to each device on a parallel circuit?
Each device is supplied the same amount of voltage as the source
