Recent content by robera1

The current is moving counter-clockwise. The magnetic field is 45 degrees down the right. How do you cross-product this?

Okay, so what does that mean in terms of vectors? The questions asks to indicate the magnetic force on the current in the new wire (the one at P). So, is this force in the same direction as the magnetic field created by the other two wires (the ones we've been talking about this whole time)

Oooooooh! Okay, this makes perfect sense! So, there are essentially two magnetic forces acting at P, the one straight down and the one to the right, which added together give a vector 45 degrees down and to the right. So, now I have to find the magnetic force acting on P, and they have added...

But what determines why when the current moves into the page it has a magnetic field that is straight down, and when a current moves out of the page it has a magnetic field that is to the right? This is so damn confusing!

I feel really stupid asking this, but if B circles around the wires, how can you draw a vector and say that B is straight down, or to the right? Isn't it technically moving around the wire, and not in anyone direction specifically?

That does not make sense to me. When my thumb is down, B points straight down. When my thumb is up, B points to the right? Shouldn't B be in the opposite direction, since I is?

Oooh I see. Okay, that makes sense. So then at the point where the current goes out of the page B points straight up? So, does this mean that the magnetic field at P is zero?

Just at this point... is it moving straight up? (I point my thumb (which represents the current) out of the page... and my fingers are straight out)

I am still really confused. If the current is going into the page, then the magnetic field could be at any angle on the page, as long as it was still perpendicular with the current. Do I say that the current is moving from the into the out, thus moving 45 degrees to the left, and thus the...

They are from the diagram. So, that is all I do... use the right hand rule?

Homework Statement Shown at right is cross-sectional view of two long straight wires that are parallel to one another. One wire carries a current out of the page, the other carries an equal current into the page. Draw a vector on the diagram to show the direction of the magnetic field, if any...

Homework Statement A metal loop is attached to an axle with a handle as shown. The north pole of a magnet is placed blow the loop and handle turned so that the looks rotates counterclockwise at a constant angular speed. Suppose the loop (the one above) were replaced by a second loop that...

Fantastic! I got the answer... thanks!

Well, the answer is supposed to be in N. And, since I am multiplying C, T, and m/s, then the -2500 should be in N also

Oh, okay. This is all of the information they give... Learning Goal: To practice Tactics Box 24.2 Determining the magnetic force on a moving charged particle. When a particle of charge moves with a velocity in a magnetic field , the particle is acted upon by a force exerted by the magnetic...