P4 - Electricity
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What is an ampere?
A unit of current
What is an attraction?
A force pulling two opposite charges together when they are brought near each other
What is a coloumb?
It is the unit of a charge
What is the function of a diode?
A component which only allows current to flow through in the forward direction. Very large resistances in the reverse direction
What is an electrical current?
The rate of flow of electrical charge. The value is the same at any position in a single closed loop
What is electrical work?
When a charge flows around a circuit, electrical is said to be done
What is insulation?(electrical term)
A layer of coating which can be used to prevent electrocution
What is a non-contact force?
A force which occurs between two separated objects. E.g. gravity, magnetic and electric forces
What is an ohm?
It is the unit of resistance
What is repulsion?
When two of the same charge repel each other
What is resistance?
A measure of the opposition to current flow
What is a series?
Components connected in a series have the same current passing through each component but share total potential difference of the power supply
What is a volt?
The unit of potential difference