electricity Flashcards
what is current
current is the flow of electric charges around a circuit
what is resistance
it is anything that slows the flow down
complete the sentence:
Current is the rate of flow of ….
charge
what is the formula for charge
charge = current x time
Q = I x t
what is potential difference
it is the energy transferred per coulomb of charge that passes between two points in an electrical circuit
what is potential difference sometimes called
voltage
what is an ammeter used for
it is used to the measure the current (in amps) flowing through a component
what is a voltmeter used for
it is used to measure the potential difference across a component (in volts)
how must a ammeter be placed in a circuit
it must be placed in series
how must a voltmeter be placed in a circuit
it must be placed in parallel
what is the rule of a series circuit
it is all or nothing
what is the rule for a parallel circuit
everything is independent
what is total resistance
it is the sum of the resistance
What is the formula for current
Current = charge ÷ time
I = Q ÷ T
What is the formula for voltage
Voltage = energy ÷ charge V = E ÷ Q
