4A.2 Electrical Energy Transfers Flashcards
1
Q
in order for an electrical current ot be effient
A
it must transfer energy usefully
2
Q
what is a voltage
A
a measure of the amount of energy a component transfers per unit of charge passing through it
3
Q
what is the equation for voltage
A
voltage = energy transfered / charge passing
4
Q
What is an electromotive force?
A
a voltage, with the energy coming into a circuit
5
Q
what is the potential difference
A
it is the voltage of a component that is using electrical energy in a circuit and is transferring it to another store
6
Q
the electronvolt
A
it is the amount of energy an electrons gains by passing through a voltage of 1 V
7
Q
1ev =
A
1.6 x 10^-19
8
Q
what is the difference between emf and potential difference
A
emf puts energy inside the ell pd puts energy outside the cell
