Direction of the induced current

AI Thread Summary
The discussion revolves around predicting the polarity of a capacitor based on the movement of electrons and the application of the right-hand thumb rule. Participants express confusion over differing interpretations of current direction, with one asserting that electricity travels from B to A, making B positive and A negative. However, another participant clarifies that conventional current flows from B to A, meaning A should be positive and B negative, as electron flow is opposite to conventional current. The conversation highlights the importance of understanding the distinction between electron flow and conventional current in determining capacitor polarity. Overall, the discussion emphasizes the need for clarity in interpreting electrical concepts.
Suyash Singh
All sites and books give different answers for this question:(

Homework Statement


predict the polarity of the capacitor in the diagram below
upload_2017-9-6_10-10-12.png


Homework Equations


right hand thumb rule
AB is capacitor

The Attempt at a Solution


The side facing south pole becomes south and north facing side becomes north hence electricity travels from B to A and thus B becomes positive and A is negative.
Am i correct?
 
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Suyash Singh, what is moving in your setup, and in what direction is it moving??
 
NascentOxygen said:
Suyash Singh, what is moving in your setup, and in what direction is it moving??
electrons are moving in a direction opposite to current
 
Suyash Singh said:
electrons are moving in a direction opposite to current
So I was mistaken to believe the arrows denote movement?
 
Suyash Singh said:
...

The Attempt at a Solution


The side facing south pole becomes south and north facing side becomes north
I agree with this.
hence electricity travels from B to A and thus B becomes positive and A is negative. ...
I disagree with this. Conventional current flows from B to A, but conventional current is positive, so in the opposite sense to electron flow. So A becomes positive and B negative.
 
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