Circuit Analysis: Voltage Direction & Power Questions

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The discussion revolves around determining voltage direction in a circuit with a center component at 200V directed upwards. Participants clarify that the voltage direction for other components, such as those carrying 20A and 10A, should align with this upward direction. Additionally, there is confusion regarding power calculation when voltage aligns with current, questioning if it should be +Vi or -Vi. The markings for + and - indicate voltage polarity, while arrows signify the direction of conventional current flow. Understanding these concepts is crucial for accurate circuit analysis and power calculations.
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I have the following circuit:
CircuitAnalysis.jpg


My question is, what do I take the voltage direction to be? For the center component, it is 200V in a positive direction being upwards so does that mean that for the other components (20A and 10A), it is also in that direction?

Thanks in advance. :smile:


EDIT: I have one more question - When voltage is in the direction of current, is the power equal to +Vi or -Vi? :confused:
 
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I don't understand the components - are they batteries, meters or what? Hmm, can't be meters because you can't run 80 A through a Voltmeter or put 200 Volts across an Ammeter!

It appears that the + and - markings indicate the voltage polarity and the arrows indicate the direction of standard (positive) current.
 

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