psyclones Posted March 9, 2015 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!
swansont Posted March 9, 2015 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.
psyclones Posted March 10, 2015 Author 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
swansont Posted March 10, 2015 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.
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