Electrical Symbols Flashcards
(13 cards)
What is a cell in the context of an electrical circuit?
A cell is necessary to push electrons around a complete circuit.
What does a battery consist of?
Two or more cells.
What does the + symbol next to the long line of a cell indicate?
This is the positive terminal of the cell.
What is the function of a switch in a circuit?
To enable the current in a circuit to be switched on or off.
What is the purpose of an indicator in a circuit?
To emit light as a signal when a current passes through it.
What is a diode?
A component that allows current through in one direction only.
What does a light-emitting diode (LED) do?
Emits light when a current passes through it.
What is the function of an ammeter?
Used to measure electric current.
What does a fixed resistor do?
Limits the current in a circuit.
What is a variable resistor used for?
Allows the current to be varied.
What is the purpose of a fuse in a circuit?
Designed to melt and break the circuit if the current exceeds a certain amount.
What is a heater designed to do?
Transfer energy from an electric current to heat the surroundings.
What does a voltmeter measure?
Potential difference (i.e. voltage).
