Finding the North Pole of a Magnet Using the Right Hand Rule

[Cici2017]

Homework Statement

A current carrying rod is held horizontally between the poles of a magnet by a magnetic force.
magnet-current (into the page) -magnet
determine which side is the north pole of the magnet?

Homework Equations

The Attempt at a Solution

If I use the right hand rule, then the magnetic field direction is clockwise around the current.
Is this right? What do I do next?

Thanks~

 

[Cici2017]

This is the question:

 

[Doc Al]

If I use the right hand rule, then the magnetic field direction is clockwise around the current.

You don't want the magnetic field created by the current. You want the force on the current due to the magnetic field of the magnet.

 

[Doc Al]

Read this: Magnetic Force on a Current-Carrying Wire

 

[Cici2017]

Read this: Magnetic Force on a Current-Carrying Wire

To determine the direction of the magnetic field, why do we use the Right hand rule instead of Fleming's left-hand rule? Thanks~

 

[TSny]

There are various right-hand rules and left-hand rules that people have invented. Most recent textbooks that I have seen talk only about certain right-hand rules and don't mention any left-hand rules. But if you are familiar with Fleming's left-hand rule, then you can use it for this problem.

The right-hand rule to which @Doc Al refers is just as good and will yield the same result.

 

[Cici2017]

There are various right-hand rules and left-hand rules that people have invented. Most recent textbooks that I have seen talk only about certain right-hand rules and don't mention any left-hand rules. But if you are familiar with Fleming's left-hand rule, then you can use it for this problem.

The right-hand rule to which @Doc Al refers is just as good and will yield the same result.

Got it! Thank you so much~

 

[Cici2017]

I can help you if you are still in a need.

Hi, thank you! Can you please help me with this? It is a follow- up question of the previous one: