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LegendF
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Important:
Imagine that there is a wire connecting the two magnetic poles, (+,-) so there is an induced current and not only an ems.
Hello there!
I'm wondering if I can use both of these methods to calculate the direction of the current.
The first one is Lenz Law. If I've understood the law currently, it helps me to determine the direction of the current, by knowing that the direction of the ''force'' that builds up is opposite the direction of the already there force, and therefore I can just use the right-hand rule and determine the direction of the current. So in this case( see image below), the force is pulling the object down, Lenz Law states that an opposite force should go upwards to prevent the movement of the object from going downwards, then I get that the direction of the force should go upwards, and give me that the current should go to the right.
However, this method is something I learned after my first one, which I've always thought should be used..
BUT! Can I also use this method?:
If I assume that the electrons are going in the same direction as the velocity I'm pulling the object downwards with, then the current should go UP, while the electrons move down. If I use the right-hand rule on this, I get that the Fm(Magnetic Force) should go to the left, this tells me that the right-end is the positive pole and the left-end is the negative pole.
Then I know that the current is flowing from + to - and from that method determine the direction. Is this possible?
But! In the first method, when I used Lenz Law, I got that the magnetic force is going UPWARDS. However, in my second method, I got that the magnetic force is going to THE LEFT just like in the image.
Are these two different forces or what?
LegendF
Imagine that there is a wire connecting the two magnetic poles, (+,-) so there is an induced current and not only an ems.
Homework Statement
Hello there!
I'm wondering if I can use both of these methods to calculate the direction of the current.
The first one is Lenz Law. If I've understood the law currently, it helps me to determine the direction of the current, by knowing that the direction of the ''force'' that builds up is opposite the direction of the already there force, and therefore I can just use the right-hand rule and determine the direction of the current. So in this case( see image below), the force is pulling the object down, Lenz Law states that an opposite force should go upwards to prevent the movement of the object from going downwards, then I get that the direction of the force should go upwards, and give me that the current should go to the right.
However, this method is something I learned after my first one, which I've always thought should be used..
BUT! Can I also use this method?:
If I assume that the electrons are going in the same direction as the velocity I'm pulling the object downwards with, then the current should go UP, while the electrons move down. If I use the right-hand rule on this, I get that the Fm(Magnetic Force) should go to the left, this tells me that the right-end is the positive pole and the left-end is the negative pole.
Then I know that the current is flowing from + to - and from that method determine the direction. Is this possible?
Homework Equations
But! In the first method, when I used Lenz Law, I got that the magnetic force is going UPWARDS. However, in my second method, I got that the magnetic force is going to THE LEFT just like in the image.
Are these two different forces or what?
LegendF
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