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September 19, 2020, 10:51:10 pm

Author Topic: HSC Physics Topics 1 & 2 Exam! 2019  (Read 6504 times)  Share 

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fun_jirachi

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Re: HSC Physics Topics 1 & 2 Exam! 2019
« Reply #15 on: August 12, 2020, 07:03:33 pm »
+1
hey great example exam thank you! for question 28 b would a zero force not be able to be established if the current of the two wires where acting in opposite directions? so a 0 is dependent on the current in the wires, not magnitude but direction??

Reasonably sure if that if the currents were acting in opposite directions, R would need to be placed outside the two wires (not in between!) - as one wire would attract it while the other would push it away; it's entirely possible to establish a zero force if the wires are acting in opposite directions. Not quite sure what the last part of your question means though :(

Hope this helps :)
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