Electricity Flashcards
What are conductors?
Materials that allow flow of electrical charge.
What is an example of a good conductor?
Metals.
What are insulators?
Materials that do not allow flow of electrical change.
What is an example of a good insulator?
Plastic.
How are metals able to conduct electricity?
Have free electrons which can move and carry a charge, allowing current to flow.
Why do cables have plastic coatings?
To prevent electric shocks as wires can be very dangerous.
What is conventional current?
Current moving from positive terminal of cell/battery around circuit to negative terminal.
What is electron flow?
Current moving from negative terminal of cell/battery around circuit to positive terminal.
What does the long part of a cell showcase?
Positive terminal.
What does the short part of a cell showcase?
Negative terminal.
What is an electric circuit?
Path for electric charge to flow along.
What is needed for an electric circuit to work?
Source of energy
A complete loop
A component
No short circuits.
What happens if the circuit is broken in a series circuit?
Current will not flow.
What is a short circuit?
Current that can flow along a path without passing through components in a circuit.
What does the cell in a circuit provide?
Push necessary to make electrons flow.
What is the equation for current?
I = Q / t
What is the equation for Ohms law?
V = R x I
What does the gradient of a V-I graph tell us?
The restistance of the wire.
What does a small gradient on a V-I graph tell us?
Low resistance.
What does a large gradient on a V-I graph tell us?
High resistance.
What does the gradient of a I-V graph tell us?
1 / resistance.
What does a small gradient on a I-V graph tell us?
High resistance.
What does a large gradient on a I-V graph tell us?
Low resistance.
How are ammeters connected in a circuit?
In series.
