Register to reply

Calculating the magnitude of the force on an electron

by jaa72
Tags: electron, force, magnitude
Share this thread:
jaa72
#1
Mar22-09, 09:33 PM
P: 1
1. The problem statement, all variables and given/known data
an electron travels at a speed of 2.0X10^4 m/s threw a uniform magnetic feild whose magnitude is 1.2x10^4 T. what is the magitude of of the force on the electron if its velocity vector and magnetic vector are
a)parralel
b)45degrees
c)parralel


2. Relevant equations
Fmax=QVB
F=QVSintheta



3. The attempt at a solution
for a i got .0012
b i got 16.47N
c i got 0
i think i am using the wrong equations
Phys.Org News Partner Science news on Phys.org
Apple to unveil 'iWatch' on September 9
NASA deep-space rocket, SLS, to launch in 2018
Study examines 13,000-year-old nanodiamonds from multiple locations across three continents
rock.freak667
#2
Mar22-09, 11:22 PM
HW Helper
P: 6,202
well using the right hand rule, which says that the current,force and magnetic field are at 90 degrees to each other, you'd see that if the velocity direction is parallel to the magnetic field you have no force.

Use th equation F=BQvsin[itex]\theta[/itex] to get the force for part b


Register to reply

Related Discussions
Calculating absolute magnitude and apparent magnitude Advanced Physics Homework 1
Calculating the magnitude of the net force bewteen charges Introductory Physics Homework 5
Magnitude and direction of the force on the electron Advanced Physics Homework 1
Electron Sphere and Magnitude Introductory Physics Homework 7
Calculating magnitude and direction Introductory Physics Homework 0