Current Flashcards
what is current
the flow of charge
how is the only way an electrical current will flow
if it is through a complete circuit (closed) and there is a source of potential difference
what is the unit for current
ampere (A)
what is current like in a single closed loop
the current has the same value everywhere in the circuit
what is the driving force that pushes the charge around
potential difference (V)
what is resistance in a circuit
anything that slows the flow down (ohms)
what does the current flowing through a component depend on
the potential difference across it and the resistance of the compound
the greater the resistance across a component….
the smaller the current that flows, for a given potential difference across the compnent
what is used to calculate the total charge through a circuit
current and time
what is the size of the current
the rate of flow of charge
what is the formula for calculating charge
Q = It (charge = current x time)
what is the unit for charge
coulombs (C)
what does the formula for calculating charge mean in terms of the relationship between charge and current
that more charge passes around the circuit when a larger current flows
learn the circuit diagram symbols as well….
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