Voltage and Current Flashcards
When the number of protons equals the number of electrons, the atom is electrically _________.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/111/639/796/q_image_thumb.png?1659484024)
neutral
The law of electrostatics states what?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/111/639/872/a_image_thumb.png?1659432277)
A simple electric circuit has what three requirements?
Voltage source
Conductor
Load
The voltage source is represented by what letters?
The battery is represented by what schematic symbol?
The voltage source is represented by the letter (E) or (V)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/111/640/263/a_image_thumb.png?1659432278)
Current flows in a simple circuit when a path is provided for the current to follow. The path current follows is called what?
conductor
Current is represented by the letter ?
What direction does current normally flow?
Current is represented by the letter ( I ).
![](https://s3.amazonaws.com/brainscape-prod/system/cm/111/640/664/a_image_thumb.png?1659432278)
A simple circuit needs a load. The load can be any device as long as charge flows through the device. A load provides resistance to current. The resistance provided by a load is represented by what letter?
The resistance provided by a load is represented by the letter (R).
![](https://s3.amazonaws.com/brainscape-prod/system/cm/111/640/850/a_image_thumb.png?1659432278)
When 6.25 billion billion electrons pass a given point in 1 second, the value of current is equal to what?
1 ampere
Electrons always move toward a ______ charged atom.
Electrons always move toward a positively charged atom. For this reason, electron flow is always from negative charge to positive charge.
______causes electrons to flow, and the flow of electrons is called _____.
Voltage causes electrons to flow, and the flow of electrons is called current.
What are three major factors and one minor factor that affect the conductivity, or the free movement of electrons in a conductor
Major Factors
- Specific resistivity of the conductor. (Silver copper, gold, aluminum etc.)
- Length of the conductor.
- Cross-sectional area of the conductor.
Minor Factor
- Temperature coefficient.
Although not the best conductor, _____ is most commonly used due to its low cost and ready availability.
Although not the best conductor, copper is most commonly used due to its low cost and ready availability.
There are times when we do not want current to flow. For those times we use materials called ______.
There are times when we do not want current to flow. For those times we use materials called insulators.
(Glass, paper, rubber, plastics)