Electrical circuits Flashcards
Battery definition
A component of a circuit made up of two or more cells.
Wire definition
A component of a circuit used to connect each component, electrons travel through.
The inside is copper, which is a good conductor of electricity and covered by plastic insulation to prevent electrocution.
Thin wire = High resistance
Thick wire = Low resistance
Switch definition
A switch is a component of a circuit used to break or connect the circuit.
When the
switch is closed, the circuit is fully connected and electrons can pass through.
When the switch is open, the circuit is broken and the electrons can’t pass through.
Cell definition
A singular electron source.
Bulb definition
A component of a circuit which transfers electricity into light energy.
Voltmeter definition
Resistor definition
A Resistor is component in a circuit which can increases the difficulty for the current to flow.
Variable Resistor definition
A Variable Resistor is a component in a circuit which can increase the difficulty for the current to flow. Unlike a Resistor, the resistance can be increased or decreased.
Ammeter
Conducting material definition
Conducting materials have a low resistance and allow a current to pass through. (Metal…)
Insulating material definition
Insulating materials have a high resistance and don’t allow a current to pass through. (Plastic…)
Current definition
The flow of electrons or charges around a circuit. Measured in Amps (A).
Potential difference definition
A measure of energy, per unit of charge, transferred between two points in a circuit. Measured in Volts (V).
Potential difference calculation
Potential difference = Current x Resistance
Resistance definition
A measure of how difficult it is for a current to flow. Measured in Ohms (Ω).
