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=÷