# Combination of current sources

Most books say that to connect sources in series, the current sources will be equal in magnitude. I really don't understand the meaning of this statement. What happens if you connect current sources of different value in series? And what is the difference between a voltage and current source because both of them produce current?

• For ideal current sources you can't do it, you will get a contradiction. Since however no current source is ideal you have to take into account internal resistance Commented Mar 30, 2015 at 16:29
• But what if you do? What contradiction Commented Mar 30, 2015 at 16:30
• Do you mean what if you do put two ideal sources? This is impossible, ideal current sources cannot exist by saying "what if we do" has no physical meaning since it cannot be done. Commented Mar 30, 2015 at 16:32
• Let me give you a situation, What if lets say a 10 year old boy who doesn't know nothing about a current source pressed the 'red button' which accedentally turned on 2 current sources connected in series and some how calibrated to the same value. Then what would happen Commented Mar 30, 2015 at 16:40