Voltage Flashcards
What is electrical potential difference
Voltage- it’s is the work done to move charge from one point to the other
What drives current around a circuit
EMF (electro motive force)
How is EMF (electro motive force) created?
Created by the imbalance of electrons by the terminal of a battery or generator between positive and negative terminal
What is voltage
Voltage is potential difference in two parts of a circuit, voltage is pressure which causes current too flow
What do we measure volts in?
Volts (V)
Voltage can be produced by 6 main methods which are…
Chemical
Friction
Induction
Pressure
Heat
Light
An example of chemicals creating voltage could be…
Two plates of opposite polarity in electrolyte transferring electrons and once the electrons hit the positive plate it creates a potential difference between the two
Friction can create voltage by…
Rubbing certain materials and taking the valence electrons and transferring them to the other material making the other material negative
What happens if you pass a wire through a magnetic field?
Voltage is created in the wire
What is the name given the the hexagon that has neg oxygen ions and pos silicon ions
Piezo quartz
What is the piezo quartz used in
Lighters or crash systems in airbags
How does the piezo quartz work
When no pressure applied to the structure it’s neutral but when pressure is applied there is voltage created between the two surfaces
How is heat voltage formed
Via merging two metal ends together and bringing the two ends to different temperatures creating a potential difference between the two, volatage
Name given to heat voltage
Thermocouple
Light voltage is formed via…
When certain materials are exposed to light there is a potential difference created such as in calculators or solar panels creating voltage
