4.1 Flashcards
1
Q
what is a coulomb
A
unit of change 1 C= 1 As. the charge paling point in a wire when a current of one amp flows for one second
2
Q
ampere
A
the current when one coulomb of change flows for one second
3
Q
number of electrons in a coulomb
A
6.25 x 10^18
4
Q
conventional current
A
flows from positive to negative
5
Q
unconventional current
A
flows from negative to positive- this is the real direction in which electrons will move in a circuit
6
Q
Electromotive force
A
the energy supplied to the charge carriers in a circuit by a battery or cell
7
Q
potential difference
A
energy supplied to a component of the circuit by the carriers
8
Q
a cell is said to have an emf of 1V when
A
it supplies one joule of energy to each one coulomb of charge flowing through it - 1V=1JC^-1
