Direction of the induced current

In summary, the conversation discusses the polarity of a capacitor in a diagram and the direction of movement of electrons and conventional current. It is stated that the side facing the south pole becomes south and the north facing side becomes north, but there is disagreement on the direction of electricity flow.
  • #1
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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  • #2
Suyash Singh, what is moving in your setup, and in what direction is it moving??
 
  • #3
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
 
  • #4
Suyash Singh said:
electrons are moving in a direction opposite to current
So I was mistaken to believe the arrows denote movement?
 
  • #5
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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Likes Suyash Singh

What is the direction of the induced current?

The direction of the induced current is determined by the right-hand rule. If the direction of the magnetic field and the direction of the motion of the conductor are perpendicular to each other, the induced current will flow in a direction perpendicular to both the magnetic field and the motion of the conductor.

How is the direction of the induced current affected by the strength of the magnetic field?

The strength of the magnetic field does not affect the direction of the induced current. The direction of the induced current is only affected by the relative orientation of the magnetic field and the motion of the conductor.

What happens to the direction of the induced current when the magnetic field changes?

If the magnetic field changes, the direction of the induced current will also change. This is because the changing magnetic field will create a changing magnetic flux through the conductor, which will induce a current in the opposite direction to the change in the magnetic field.

How does the speed of the motion of the conductor affect the direction of the induced current?

The speed of the motion of the conductor does not affect the direction of the induced current. As long as the conductor is moving at a constant speed and the magnetic field is perpendicular to its motion, the direction of the induced current will remain the same.

What is the direction of the induced current in a closed loop circuit?

In a closed loop circuit, the direction of the induced current will be such that it opposes the change in the magnetic field. This is known as Lenz's law and it ensures that the induced current produces a magnetic field that opposes the original changing magnetic field.

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