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Direct-current circuits
Second Kirchhoff rule (circuit rule)
EMF of source
U
src
=
V
x
nV
μV
mV
V
kV
MV
voltage drop on internal resistance of source
U
int
=
V
x
nV
μV
mV
V
kV
MV
total voltage drop in external circuit
U
ext
=
V
x
nV
μV
mV
V
kV
MV
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"
