current, voltage and resistance. Flashcards
what is electrical current?
flow of electrical charge.
the greater the rate of flow of electrical charge the higher the what?
current.
what is current measured in?
amperes A.
how is current measured?
ammeter.
what is electric charge measured in?
coulombs C.
what equation helps to work out electric charge?
charge flow = current ✖ time.
what is resistance?
of a component is the the measure of how it resists the flow of charge.
what does a higher resistance mean?
more difficult it is for charge to flow.
lower the current.
what is resistance measured in?
ohms.
what does the potential difference ( or voltage) tell us?
difference in electrical potential from one point in a circuit to another.
potential difference can be thought as what?
electrical push.
what does it mean if the potential difference between a component is bigger?
greater flow of charge through the component .
bigger the current.
what is potential difference measured in?
volts V.
how is potential difference measured?
voltmeter.
what equation links potential difference, current and resistance?
potential difference= current ✖ resistance.
