Electricity ⚡️ Flashcards
(29 cards)
Electrical energy
Energy that comes from a charge.
Current electricity
The flow of electrons through a circuit.
Electric circuit
A loop that allows electrons to flow continuously .
Ammeter
An instrument used to measure current .
Ampere or amp.
Unit for current.
Electron
A negatively charged particle
Electrons always flow from the ______ of the battery to the _______ .
Negative pole, positive pole
Insulator
A material that does not allow current electricity to flow. Ex: plastic
Conductor
A material that allows current electricity to flow. Ex: copper
Resistance
How difficult it is for a current to flow through an electrical component.
Ohmemeter
An instrument used to measure resistance.
Units for resistance
Ohms
Fixed resistor
A resistor with a set resistance
Variable resistor
Allows you to change the resistance
Potential difference/voltage
A pushing force from an electrical power source that makes electrons move through a circuit.
Ohms law
When The relationship between voltage and current is directly proportional.
Power
Is the rate at which one form of energy is transferred to another.
Power formula
Power= work
——
Time
Electrical power
The rate at which electrical energy is transferred into another form of energy.
P=vxi
Electrical power unit
Watts
Series
Connected in a single loop
Parallel
Connected in more than one loop or branch
Dc
Direct current, a current that always flows in one direction. Ex: battery
Ac
Alternating current: a current that keeps changing direction
- cheaper and easier
