# What is kU (V/V)

I have following task I know it's probably really simple (just simple Ohm's law), but I have no clue what kU is. Could anyone explain it to me in the simplest way possible.

• The circle labelled "E" and the one labelled "kU"...are they both supposed to be current sources, or both voltage sources, or is one a source and the other one is an ammeter or what? – The Photon Dec 13 '16 at 16:09
• kU = kV. U is used instead of V for volts in parts of Europe. – Leon Heller Dec 13 '16 at 16:13
• They look to both be current sources but I have never seen that notation used before – DerStrom8 Dec 13 '16 at 16:14
• @LeonHeller While I agree with you in some cases, I don't believe that is the case in this particular circuit. kV doesn't make any sense in this context. – DerStrom8 Dec 13 '16 at 16:14
• It appears the U is the voltage across R, and kU is a voltage dependent voltage source (since the unit of k is V/V) – Chu Dec 13 '16 at 16:43

• You don't have 2 unknown parameters. U depend on I, then you can write 1 equation with only one unknown parameter (from KVL): $I= \frac{E-kU}{R} = \frac{E-kRI}{R}= \frac{E}{R}-kI$. Then $I=\frac{1}{k+1} · \frac{E}{R}$ – Antonio Dec 13 '16 at 16:42