Transferring energy - SP10 Flashcards
1
Q
how can a resistor be described?
A
a lattice of vibrating ions through which electrons can travel
2
Q
what is the issue with a resistor being a lattice of vibrating ions?
A
heats the current which can be problemating as heating wastes energy
3
Q
what is direct current?
A
when electrons move in one direction in a circuit
4
Q
how is alternating current caused?
A
alternating potential difference casuing electrons to osciliate from side-side
5
Q
what is the national grid?
A
country-wide network of wires + cabels that supplies our homes with energy
