psyclones Posted March 9, 2015 Share Posted March 9, 2015 Hi, Can you help with the following (please refer to attached). If I understand the problem, both magnetic fields B1 & B2 need to change direction, due to the change in current (I) by replacing the positive with a negative ion. Your thoughts, My apologies, but I can't appear to upload the attached file. I'll try again later!! Please find attached! Link to comment Share on other sites More sharing options...
swansont Posted March 9, 2015 Share Posted March 9, 2015 You are correct that reversing B will give the same force on the opposite charge. What about E in the region between the plates? You are supposed to getting no deflection there. Link to comment Share on other sites More sharing options...
psyclones Posted March 10, 2015 Author Share Posted March 10, 2015 Thank-you swansont for you post. so using Lorentz force, if a negative ion is introduced the electric field also must be changed? Please find attached. Thank-you swansont for you post. so using Lorentz force, if a negative ion is introduced the electric field also must be changed? Please find attached. With the attachment, I meant to say E and B2 need to be reversed, if I assume B1 doesn't. hwork-phys(rev).pdf Link to comment Share on other sites More sharing options...
swansont Posted March 10, 2015 Share Posted March 10, 2015 Yes, the E and B in the deflection-free region have to be reversed, and you previously concluded the B in the deflection region had to be reversed. Link to comment Share on other sites More sharing options...
psyclones Posted March 10, 2015 Author Share Posted March 10, 2015 Thanks swansont, solved it. Link to comment Share on other sites More sharing options...
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