physics notes on Unit 5 - Technology in Space AKA: Thermodynamics

, Charge ⑨
IC of 88
change X-oelection
&
charge = -I
⑧ .
x10-19 C


Each has amount of
charge
·
electron a certain
e= electron

charge
= -1 .
602410 G We

XC of the
In
charge
·




number of electrons = =
6
.

24x1018 electron
1 602x10-19
.




3
= total
N Q
charge
=



e =
electron charge
N = number of electrons



Current

3
Voltage

T
The
= rate of flow of charge
er I
= ↳
&
related to speed Energy per
of charge


-
VOLTAGE S unit charge
Kirchoffs 2nd Law
The total The total

117
T


To voltage in out
voltage
X [vin (In one
Loopt
toot Evout loop-root




I v2
I -


R

, current in a lamp
S mar
is is t Sua = 8x103A
current obtained ?



G
** >
-
4C in 500s 41500 =
8x103A =
But




DEFINITIONS
CURRENT is rate of flow of
the charge

Ill---- current k


Ti
I AMMETER




&
measured with an

connected in series
W

&




1
electron
&

flow



VOLTAGE is the clone
work per unit charge
↓
measured with a VOLTMETER
connected in parallel

RESISTANCE is the opposition to current

, rchoff's 1st Law
-



↳
current in series + paralles circuits :




QJUNCTION -O ]
·a ↳ less
resistance




& Fin =
[Tou -




(at the junction


eg
. JTlT
1 s
Al

-E
i Lo
·
S J
A2


As
&




Az = 3A A4 9 A=