January 2022
Basic
Charge :
Symbol Q
· =
·
measured in coulombs (C)
The amount
of charge that passes in
I second when
the current is I amphere
.
"elementary change'
,
charge electron is the
·
on one
↓
C =
19x10-192 -
This is the size of the
age
-
· How
many
electrons in I comemb
of charge ?
I
- = 6 25 x 1018 electrons
.
1 .
6x10-19
Number
of charge carriers = Total
energe -
carrier
.
charge
on each
charge
Charge
·
is the
Lea under a current-time
graph
Current
·
We measure current in Amps (A)
is I
·
symbol
of flow of =
#
Rate Q It
current is the
energe
=
, Conventional current :
Flows It's
·
from positive to
negative .
the direction that positive
charge would
flow
.
Electrons
flow the opposite direction n.
·
t
↳ electronsfr
conventional a
!
-
-
current
positive charge. flowS
his
way
.
Amphee Hours (Ah)
·
Use Q =
It :
↳ I =
Amps (A) 1.00 An =
3000C .
t =
nows (n)
Q =
Amphre nours (Ah)