how to know the direction of induced current using lenz law in a combination of straight and closed loop.
shibani2:
can anyone help me... it's a need
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is a magnet going into a coil of wire, or a wire approaching the magnet, can be thought of either way.
can I send the pic of my question.. but I don't know how to do it..
can you please tell me
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I am at the elementary level of physics. That means preferably no calculus. And most or all I know to use in determining direction is the right/left hand rule. I am not sure exactly why it works. Maybe I will learn they after I know enough about calculus.
There are three ways of inducing current in a loop/coil of wire as shown in my book.
Situation1 is a magnet going into a coil of wire, or a wire approaching the magnet, can be thought of either way.
Situation2 is changing the area of magnetic flux by pushing a loop of wore into a magnetic field.
As is drawn in the picture of situation1, the arrows, I determine by using right hand rule (Palm= force, index to pinkie = direction of magnetic field), are pointing in difference direction. That is perfectly normal and fine, because each arrow reinforces one another. And Lenz's law states that the true direction is opposite of that determine by the right-hand rule.
Situation 2 confounds me. Two vertical lines are cutting across the field. But since they are connected, the induced current, I conjecture, would cancel each other.
I saw in a YouTube video that to determine the direction in such situations as 2, one curl the fingers of his or her right hand along the wire, with the thumb pointing in the direction of the field. So the curled fingers are in the direction of the current. Basically the directions of current indicated by the thumb is always opposite the direction of the changing field
There are three ways of inducing current in a loop/coil of wire as shown in my book.
Situation1 is a magnet going into a coil of wire, or a wire approaching the magnet, can be thought of either way.
Situation2 is changing the area of magnetic flux by pushing a loop of wore into a magnetic field.
As is drawn in the picture of situation1, the arrows, I determine by using right hand rule (Palm= force, index to pinkie = direction of magnetic field), are pointing in difference direction. That is perfectly normal and fine, because each arrow reinforces one another. And Lenz's law states that the true direction is opposite of that determine by the right-hand rule.
Situation 2 confounds me. Two vertical lines are cutting across the field. But since they are connected, the induced current, I conjecture, would cancel each other.
I saw in a YouTube video that to determine the direction in such situations as 2, one curl the fingers of his or her right hand along the wire, with the thumb pointing in the direction of the field. So the curled fingers are in the direction of the current. Basically the directions of current indicated by the thumb is always opposite the direction of the changing field
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