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  • Writer's picturekeshprad

PhysicsBowl 2016 Q9


9) We are given a circuit with a resistor hooked up to a power source. This question is closer to the conceptual side. We just need to identify the direction of the electron flow and electric field through the resistor.


Let's start with the conventional current.

Where I is current

You may notice that our conventional current flows out of the battery's positive end and back into the battery's negative end. However, conventional current is not the same as electron flow.


Conventional current is the flow of positive charges and is used primarily because this was the convention used during the discovery of current.


Conventional current points in the same direction as the electric field, but the opposite direction of the electron flow.

Where E is electric field, and e- is electron flow

Answer: B

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