Cyclotron Radius of Proton: .625m

  • Thread starter Thread starter Noreturn
  • Start date Start date
  • Tags Tags
    Cyclotron Radius
Click For Summary
SUMMARY

The cyclotron radius of a proton moving at 3.0 x 105 m/s in a magnetic field of 5 x 10-6T is calculated using the formula r = mv/qB. The correct calculation yields a radius of 625.5m, but the expected answer is .625m, indicating a potential error in the problem statement. The magnetic field value is significantly lower than typical cyclotron setups, suggesting a possible typographical error in the problem's parameters.

PREREQUISITES
  • Understanding of cyclotron motion and its equations
  • Familiarity with the concepts of magnetic fields and their units
  • Basic knowledge of particle physics, specifically protons
  • Proficiency in dimensional analysis and significant figures
NEXT STEPS
  • Review the derivation of the cyclotron radius formula r = mv/qB
  • Investigate typical magnetic field strengths used in cyclotron applications
  • Learn about the significance of significant figures in scientific calculations
  • Explore common errors in physics problem statements and how to identify them
USEFUL FOR

Students studying physics, particularly those focusing on electromagnetism and particle motion, as well as educators looking to clarify common misconceptions in cyclotron problems.

Noreturn
Messages
49
Reaction score
0

Homework Statement


The cyclotron radius of a proton moving at 3.0*10^5 m/s perpendicular to a 5*10^-6T magnetic filed is:

Homework Equations


r=mv/qB

The Attempt at a Solution


So plug and chug:

r= (1.6*10^-27)(3*10^5)/(1.602*10^19)(5*10^-6)

r=625.5m

However they have it down as .625m. Where do I get the sig figs wrong at?
 
Physics news on Phys.org
Check the input numbers. The magnetic field looks awfully small for a cyclotron magnet and is close to the Earth's magnetic field.
 
I just checked the problem again and looks like I still did it right. Is it maybe just possible they messed up, or is the answer indeed .625?
 
Your answer is right.

The extremely low magnetic field (1/10 the magnetic field of Earth) suggests that they originally wanted to ask about 5*10-3 T and then changed it without changing the answer.
 

Similar threads

Replies
7
Views
2K
  • · Replies 26 ·
Replies
26
Views
3K
  • · Replies 4 ·
Replies
4
Views
12K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 1 ·
Replies
1
Views
1K
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
7K
Replies
1
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K