Calculating Magnetic Force for Homework Assignments

AI Thread Summary
The discussion focuses on calculating magnetic force for homework assignments, emphasizing the importance of showing work in solutions. Participants express difficulty remembering the left-hand rule (LHR) and right-hand rule (RHR) for magnetic force calculations. A suggestion is made to provide clear explanations alongside answers to aid understanding. The conversation highlights the value of using mnemonic devices for recalling these rules. Overall, clarity in problem-solving is deemed essential for mastering magnetic force concepts.
Cici2017

Homework Statement

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Homework Equations

The Attempt at a Solution


Is it A?
 
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Yes
But it would be good if you'd shown how you got it.
 
I can never remember LHR and RHR, so I find these a useful aide memoire

Fields&Wires.png
 
Merlin3189 said:
I can never remember LHR and RHR, so I find these a useful aide memoire

View attachment 208175
Thank you! :wink:
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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