When applying KCL at the node for the first equation, why doyou choose the curre

Question

When applying KCL at the node for the first equation, why doyou choose the current (io) to have a positive sign?I.e. how do you know that current is flowing into the node? When working out the power dissipated you have the equationusing the same current (io) but this time you use anegative sign in the equation. How do you know when to use a positive or negative sign forthis current in both situations? When applying KCL at the node for the first equation, why doyou choose the current (io) to have a positive sign?I.e. how do you know that current is flowing into the node? When working out the power dissipated you have the equationusing the same current (io) but this time you use anegative sign in the equation. How do you know when to use a positive or negative sign forthis current in both situations?

Explanation / Answer

it doesn't matter how you label current coming into load as long asyour consistant. current always travels from high to low potential.so the current in this circuit is coming into the node. the io in the first part only helps you find Vo. in thesecond part, when finding power dissapated by control source,they are actually using a different current. THANK YOU AND PLEASE RATE

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