2. Electricity Flashcards
What direction do electrons flow in?
Opposite direction of the conventional current
What is charge?
The electrons that are always in a wire - whether connected to a cell or not
What is current?
The flow of electrons in a conductor - when it’s connected to a cell in a complete circuit
What is current measured in?
Amps (A)
What is voltage?
The push and pull of electrons in a wire - makes electrons flow
What is voltage measured in?
Volts
What is electrical energy?
Energy carried by current and converted to heat and light energy
Is the current the same all the way round in series?
Yes
Why do electrical charges move through metals?
They have some electrons that are free to move from their atoms
What is an electric current?
A movement of charge
What is electrolysis?
When current flows in a liquid, carried by positive and negative ions
What happens when electrical current flows through a resistor?
Electrical energy is transformed into heat energy
Another phrase for energy transferred?
Work done
What does the energy transferred depend on?
Amount of charge carried by electrons and p.d. Pushing the charge around
What is the power?
The rate at which energy is transformed
What charge do electrons have?
Negative
What direction do electrons flow in?
Opposite direction of the conventional current
What is charge?
The electrons that are always in a wire - whether connected to a cell or not
What is current?
The flow of electrons in a conductor - when it’s connected to a cell in a complete circuit
What is current measured in?
Amps (A)
What is voltage?
The push and pull of electrons in a wire - makes electrons flow
What is voltage measured in?
Volts
What is electrical energy?
Energy carried by current and converted to heat and light energy
Is the current the same all the way round in series?
Yes