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I I
-✓
, 21.2.54 25.01235 zzs] 7.5
- 62 .§±W* ¥oRT 2100-2
I ,=vpt¥=l -25A greeted n
anrhmey mmop power
JLA add forIn a series I is constant Rtor÷= f- art -1¥ Inverse required
m÷#g|±.
⇐¥ k¥-10
late,t+foIn
Pan "eh Voltage is constant
m& YZV ,=Vz=V ,
= Tooa: Rtz > - 12.552 I b not Consent
last R consumes the most power
Drift VelocityI=n Arg Vz ÷A
qIz current
na number of chargese
carrier densityA -
cross sectional area
v a velocityq= charge A 1.6 ×|÷
Ian Aug I = ✓
I = MEAn A
qn = 5×1028 m→d = lmm = 0 .o 01 m
↳ A =TO0005 'mV = ?
.
Internal Resistance
Batteries have Internal
Rerrstanq-team
Emf - Idol Voltage VotzEIrRj=E - IrE =RiTIr
E=I(red
Potential Divider
VIE
F- qvD since
*magnetic Field
to:*. :#:dForce on Electric Current Dueto Magnetic Meld
\length of ware exposed
to magnet
11 :agnetk flhx ( ¢) or Phi : amount at magnetic field
Changing mag field = emf m acoil
QE
Wz p•lzqD . l
E=V=±az9ngB1=vµEtan ⇐
.→÷YE:g#÷°
gives men flux
Flux linkage : Nq§ When flux changes Aemtwdnced,
current flowsA of coils
faradyb Law : E±*¥@¢aeof fwxA of
coil
Lenz 's law ¥z#Iµ¥D¥i=: Alternating Currents
-%L°←periodically reverses direction
- Do0.
ozis
-0*26 ¥-then
E
Faster Spin of Cost - rate of 0 of flux → Voltage
↳ higher Voltage / higher frequency
Root Mean square values
↳ to:*k
= Irms Vans = Vfztm'
o : Pmc,
= I . V .Rve= TE . ¥
r=u¥n=¥
Transformers and Power loss
Ac Low ✓how#head kll@
ironnorInputHarm
t¥a3@e£N
¥.=Vj÷=F÷ . Tonyai.eu ftktewf
SesecondaryA of turns ↳ output
Eddy Currents
↳ lamination prevents the circling of electrons
Power Loss : ITR - Ross
I=÷