Can I Use My Calculator for the Upcoming Physics Exam?

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SUMMARY

This discussion focuses on the application of the right-hand rule in electromagnetism, specifically in determining the direction of force, magnetic fields, and current in various physics problems. Participants analyze specific questions from a physics exam, including the direction of forces in magnetic fields and the behavior of currents in loops. Key concepts include the right-hand rule for both moving charges and current loops, as well as the relationship between velocity, magnetic field, and force. The discussion emphasizes the importance of visualizing vector directions and the correct application of the right-hand rule to solve problems accurately.

PREREQUISITES
  • Understanding of the right-hand rule in electromagnetism
  • Familiarity with magnetic fields and forces on moving charges
  • Knowledge of current loops and their magnetic field properties
  • Basic principles of electromotive force (emf) and current direction
NEXT STEPS
  • Study the right-hand rule for moving charges and current loops in detail
  • Learn about the Lorentz force law and its applications in physics
  • Explore the concept of electromagnetic induction and Faraday's law
  • Practice solving problems involving magnetic fields and forces on charged particles
USEFUL FOR

Students preparing for physics exams, educators teaching electromagnetism, and anyone interested in mastering the concepts of magnetic fields and forces in physics.

  • #61
All right i need a CLarifcation on this one
http://online.physics.uiuc.edu/cgi/courses/shell/phys102/fall06/prep2a.pl?practice/exam2/sp06

Question 21


The angle i pick should be what to the field line? i wanted to do 90-22.5 but that won't work. Thanks a lot
 
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  • #62
Last Problem then I am off to exam, Thanks Olderdan and whoever else that helped me. Really appreciate it

http://online.physics.uiuc.edu/cgi/courses/shell/phys102/fall06/prep2a.pl?practice/exam2/fa05


Question 8
 
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  • #63
Alt+F4 said:
All right i need a CLarifcation on this one
http://online.physics.uiuc.edu/cgi/courses/shell/phys102/fall06/prep2a.pl?practice/exam2/sp06

Question 21


The angle i pick should be what to the field line? i wanted to do 90-22.5 but that won't work. Thanks a lot
Rotate through the small angle from the direction of v to the direction of B. It is just 22.5
 
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  • #64
Alt+F4 said:
Last Problem then I am off to exam, Thanks Olderdan and whoever else that helped me. Really appreciate it

http://online.physics.uiuc.edu/cgi/courses/shell/phys102/fall06/prep2a.pl?practice/exam2/fa05


Question 8
Flux is
Φ = BAcosθ where θ is the angle between the loop normal and B. θ = 30 degrees

The only thing changing is B, so

dΦ/dt = (Acosθ)dB/dt
 
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  • #65
Can't you take the exam for me?
 
  • #66
Alt+F4 said:
Can't you take the exam for me?
What exam are you taking? Could I bring all my reference materials with me? I still remember how to do this stuff, but it sure is nice having the references readily available when you don't remember the exact formulas, values of constants, etc.
 
  • #67
OlderDan said:
What exam are you taking? Could I bring all my reference materials with me? I still remember how to do this stuff, but it sure is nice having the references readily available when you don't remember the exact formulas, values of constants, etc.
nope no refrence but u could program ur calculator. I am takin physics exam in like 2 hrs.
 

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