EG1 CH.1 Flashcards
The physicist and pioneer in electricity from a noble family in Como Italy.
Count Alessandro Volta
What was the first battery called?
Voltaic Pile
What was the first battery made of?
stacked discs of coper, zinc, and cardboard soaked in salt water.
Where did the word volt come from?
Is named after count Volta.
What is voltage?
Voltage is electric pressure or electromotive force
What unit measures electric pressure?
The volt
Voltage is synonymous with what?
electric pressure and electromotive force
The concept of voltage is similar to what other element?
water pressure
In the power system design voltage affect many things, what are some of them?
The amount of insulation needed for a given power line, The separation between line conductors, Safe working practices, and The types of tools needed to work on the lines.
From what two points is voltage taken from?
Line-to-neutral and line-to-line
What are the typical distribution system voltages?
7200/12470, 7600/13200, 12000/20800, & 19900/34500
Why do transmission lines have only one reading?
Transmission lines do not carry a neutral conductor.
When would distribution line have only one reading?
If the are underground and thus have no neutral.
Who was the French physicist who laid the foundations for science of electrodynamics through his demonstration that electric currents produce magnetic fields?
Andre Ampere
What unit measures current flow?
The amp
What is a coulomb?
The quantity measurement of electrons.
How many electrons in one coulomb?
6.25 quintillion
What does it mean when one amp of current flows?
It means that a coulomb of electrons passes a given point in one second.
What is an amp defined as?
An amp is defined as one coulomb per second and is the measurement of the flow of electric current
Amperage is similar to what other element?
Gallons per minute in a water system
What does an ammeter or amp meter tell us?
An amp meter reads the number of coulombs per second flowing in a circuits, which tells us the number of amps of current flow.
Why is Amperage important?
Amperage is important because wires are rated for a given amount of current flow.
What happens if the amperage rating of a wire is exceeded?
The wire melts due to the added friction created by the colliding electrons in the wire.
What allows greater conduction solid or stranded wires?
Stranded wires
In terms of speed how is light and current different?
Light travels a given distance and current is an impulse.
