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What is the direction of the magnetic field that produces the magnetic force on a positive charge as shown in each of the three cases in the figure below, assuming $\mathbf{B}$ is perpendicular to $\mathbf{v} ?$
Part $(a) :$ The direction of the field will be into the page.Part $(b) :$ The direction of the field will be to the left (west).Part $(c) :$ The direction of the field will be out of the page.
Physics 102 Electricity and Magnetism
Chapter 22
Magnetism
Magnetic Field and Magnetic Forces
Sources of Magnetic field
Electromagnetic Induction
Inductance
Cornell University
University of Washington
Simon Fraser University
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Hi, everyone. So in in this question, we need to find out the direction off the magnetic field in different cases. So 1st 1 is positive charges. So all the charges her positive. We don't worry about the flipping if we remember, so we just need to He was the right hand rule directly. So in the first case, we hope was the to charge, which is? Well, we know ports and from the magnetic field due to magnetic field forests is acted to the right, and we need to find direction off the magnetic field. So our dishes a so remember, we remember the right hander rule which tells as how to dead termite determining the direction off the force. Eso were remember that, uh, four fingers should have a direction off the magnetic field, and Assam should have a direction off velocity. Then force is coming out from the power, right? If the charge is positive off course. Um, and now let's take the right hand and, ah, position it such that if force is coming out from the power and velocity has a direction off it some and look at the four fingers. Uh, and it's the direction. These four fingers, uh, show us the direction off the magnetic field. So in this case, magnetic field is going into the page or into this creep E in. So in the second. Okay, Case, um, charges going down and force he's going into the page again with same logic. We should position the right hand such that, uh, horses coming out from the pound. So that means in this case, pound is facing towards the screen, and he's some has a direction of Felicity. Magnetic field is to do left. And in the third case, we have it charged, which is moving left and force. He's acting op words, and we can easily find it. Magnetic field. He's coming from the page. That's it. Thank you.
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