current and voltage Flashcards
1
Q
what is current
A
its the rate of flow of charge
2
Q
what is electrical current in solid metallic conductors
A
its the flow of delocalised negatively charged electrons
3
Q
why is current conserved at a junction in a circuit
A
it is conserved at unction because this is where the current splits in a parallel circuit
4
Q
when to use a parallel circuit and why
A
its more practical because different components are connected separately to the supply so if one component breaks others continue working
5
Q
when to use series circuits
A
everything is connected in a line so the voltage is shared out between every component good for fairy lights
6
Q
what is voltage
A
its the energy transferred per unit charge passed the volt in joules per coulomb
