P5 eletric circuits Flashcards
how does a material become charged?
by gaining or losing electrons
what will 2 objects carrying the same charge do when they’re brought close to each other
will repel
what is an electric field?
region of space around a charged object in which another charged object will experience an electrostatic force
what is electric current?
rate of flow of charge
what unit is charge measured in
coulombs (C)
what unit is current measured in?
amperes (A)
what is the same at all points when charge flows through a closed loop?
current
what must there be in a closed circuit in order for CHARGE to flow?
source of potential difference
name a source of potential difference
battery or cell
what 2 factors does current depend on?
resistance and p.d
what is an ohmic conductor?
conductor where current is directly proportional to the voltage