Register to reply 
Magnetic fields 
Share this thread: 
#1
Mar2304, 02:52 PM

P: 11

A Fe+ ion is traveling at 200 m/sec in a direction 20 deg south of west at a point. The magnetic field at that point is 0.4 T directed at 10 deg west of south. What is the instantaneous magnetic force that acts on the Fe is how many newtons?



#2
Mar2304, 03:19 PM

P: 1,004

The magnetic force on a charge that travels through a magnetic field is:
[tex]\vec F_m = q\vec V \times \vec B = qVB\sin \alpha[/tex] ([itex]\alpha[/tex] being the angle between the field vector and the velocity vector of course.) 


#3
Mar2404, 10:30 AM

Emeritus
Sci Advisor
PF Gold
P: 29,238

Since the original question involves the exact vectorial direction of the force, and since cross products are not commutative, this can produce an error in the direction. Zz. 


Register to reply 
Related Discussions  
Magnetic Forces on CurrentCarrying Wires (in magnetic fields). Is answer correct?  Introductory Physics Homework  2  
Magnetic forces/magnetic fields  Advanced Physics Homework  0  
Magnetic Forces and Magnetic Fields (mass spectrometer)  Introductory Physics Homework  8  
Electric fields, magnetic fields and Lorentz frames  Advanced Physics Homework  5  
Magnetic fields inducing electric fields  turning on lightbulb with magnetic field  Introductory Physics Homework  3 