electricity Flashcards
1
Q
Kirchhoff’s first law what is it?
A
The sum of the current entering any junction is equal to to the sum of the current leaving a junction. (Conservation of charge).
2
Q
Kirchhoff’s second law is what?
A
The sum of the e.m.f. is equal to the sum of the p.d. in a closed loop. (conservation of energy)
3
Q
what is a charge?
A
current x time in seconds= charge measured in coulombs
4
Q
what is current?
A
flow of charge measured in amps
5
Q
what is the e.m.f.?
A
the energy given per coulomb or unit of charge that pass through a power supply
