# Why doesn't the current flow in the other loop in an RL circuit?

In this circuit, the current only flows in the first loop:

There is a short circuit, so I think it's because of that, but I don't understand why it happens.

• Why would current flow in the other loop? Where would it flow from & to? Feb 8 at 18:40
• @brhans my confusion comes because of the wire at the bottom, why the current doesn't flows in that way to the loop at the right? Feb 8 at 18:47
• A dogmatic solution would be in oking KCL: draw a closed surface around the first half of the circuit, so that only the bottom wire will go through it. Then apply KCL. What do you get? Feb 8 at 18:53
• For current to flow, there has to be a complete loop between whatever is driving the current - a voltage or current source - and wherever the current is going, a complete circuit. The components on the right form a loop, but it does not form a loop with the current source.
– vir
Feb 8 at 18:55
• @vir your condition might be necessary but is not sufficient. For example add a wire at the top, parallel to that at the bottom, and both wires become parts of a loop with the generator. But will current flow in them? Likewise, the fact that 'R and L are shorted' has nothing to do with the lack of current in the connecting bottom wire. Feb 8 at 19:47

Think about the argument I put forward below: -