series, parallel, multiplier, shunt, Wheatstone Bridge

series

전류동일

KVL

V=V1+V2 =I·R1+I·R2

 

R totalRt=R1+R2+···+Rn =n·R

 

I totalI=V/Rt =V/  R1+R2

 

V1=R1/ (R1+R2) ·VV2=R2/ (R1+R2) ·V

 

parallel

전압동일

KCLI=I1+I2 = V/R1 +V/R2

 

R totalRt=1/(1/R1+1/R2) =R1·R2/(R1+R2) =곱/합 ···두개일때만 가능Rt=1/(1/R1+1/R2···1/Rn) =R/n

 

V totalV=I·Rt =I·R1R2/(R1+R2)

 

I1=R2/(R1+R2) ·II2=R1/(R1+R2) ·I

 

 

multiplier

shunt

 

Wheatstone Bridge

전력 P[W]

P=W/t =Q·V/t =I·t·V/t =V·I [W]

(V=IR, I=V/R)

 

P=I^2·R

P=V^2/R

 

PS=QR

X=RP/Q

 

 

 

 

 

 

 

 2Ω · 4Ω= 1Ω · 2Ω