'''In Detail:'''<br>
The best way to get a better understanding is to have a look at the principle of voltage divider.<br>
[[Datei:voltagedividerVoltage-divider-shunt.jpgpng]]<br>
In a voltage divider the current is always the same.<br>
[[Datei:I_total.gif]]<br>
This table displays how the resistance value of the shunt (R2) R_shunt drains power if it is too high.
Also you can see how small the voltage drop gets if the resistance is to low, what makes it hard to measure.
! I (total)
! U (total)
! R1 R_load! R_shunt! U (load)! R2 U (shunt)! U1! U2! P(lost)
|-
| 0,25A
| 0.1
| 4.975V
| 0.25V025V
| 0.00625W
|}