Electricity Flashcards
What is electricity
Movement of electrons
What is static electricity
Stationary charge
What is dynamic electricity
Charges moving due to electric field, creates current
What is a conductor
Electricity flows through, usually metal
What is a insulator
Blocks electricity, e.g. rubber, glass, wood
What is a semi conductor
Electricity normally cannot flow through but with enough energy it can
What is a super conductor
Electricity flows through with zero resistance, very low temps required
What is charge
Number of electrons
Symbol - q
What are the units for charge
Coulomb (C)
What is current
The rate of flow
Symbol - I
What are the units for current
Amperes (A)
What is the formula for current
I = q/t 1A = 1C/sec
What is voltage (potential difference)
Energy put into and used in a circuit
Symbol - V
What are the units for voltage
Volts (V)
What is the formula for voltage
V = E/q
What is resistence
How much a component resists electrons
Symbol - R
What are the units for resistence
Ohms (omega)
What does “in series” mean
Components are connected one after the other
Same current though all the components
What does “in parallel” mean
Components split the circuit into multiple paths
Current is force to split up to pass through components
