I to represent the direction that conventional current which is the movement of hopeful charges. And also so we can directly use the ideal Hand ascendancy to figure out which method the magnetic field lines must be pointing. For this reason our thumb suggest in the direction of velocity of positive charges and so that's going to be directly up. Our palm encounters the direction that the force. And our fingers space you can think of are mini fingers that are going to be aligned in the direction of the mini field lines that magnetic field. And that is right into the page. And so us can attract exes below to represent magnetic field into the page. In part b, we have actually our thumb pointing down. Our palm is in the direction the the force which is into the page because this x to represent an arrowhead going away from you since you simply see the tail feathers of the arrowhead moving away from you into the page. And so our palm is encountering flat versus the page, thumb is down and our fingers of our right hand space pointing come the left. And also so we attract an arrowhead to the left, that's the direction the magnetic field. If you're not acquiring the exact same answers, make certain you're utilizing your ideal hand due to the fact that it's a typical mistake in the use of the left hand. So, in part c, we have our thumb pointing to the left, our palm is encountering upwards and also our fingers are stating of the page. And so we draw dots to represent an arrow head coming towards you. This magnetic field line is coming the end of the page.">

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This is college Physics Answers v Shaun Dychko. We"re walk to usage the best Hand dominance to determine the direction of the magnetic field lines in every of these 3 scenarios. Now, this ns represents the direction the conventional present which is the movement of optimistic charges. And also so we can directly use the appropriate Hand ascendancy to figure out which method the magnetic ar lines must be pointing. So our thumb point in the direction of velocity of optimistic charges and also so that"s going come be directly up. Our palm encounters the direction of the force. And our fingers are you can think of space mini fingers that space going to it is in aligned in the direction the the mini field lines of magnetic field. And that is right into the page. And also so we can attract exes below to stand for magnetic ar into the page. In part b, we have actually our ignorance pointing down. Our palm is in the direction that the force which is right into the page since this x represents an arrowhead going away from you because you just see the tail feather of the arrow moving far from you into the page. And so our palm is dealing with flat versus the page, thumb is down and our finger of our appropriate hand space pointing to the left. And so we attract an arrow to the left, that"s the direction that magnetic field. If you"re not getting the exact same answers, make sure you"re utilizing your ideal hand because it"s a common mistake in the usage of the left hand. So, in component c, we have actually our ignorance pointing come the left, our palm is encountering upwards and our fingers are discussing of the page.

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And also so we attract dots to represent an arrow head coming in the direction of you. This magnetic field line is coming out of the page.