# Electromagnet investigation lab assignment

1. Jul 18, 2011

### helpme2011

1. The problem statement, all variables and given/known data

An alpha particle enters a uniform verical magnetic field of 1.0 T with a velocity of 2.0m/s East.
a) Find the force exerted on the particle by the field.
b) Find the acceleration of the particle.
c) Find the radius of curvature of the path of the particle.

2. Relevant equations

F= QvB ???

3. The attempt at a solution
B= 1.0 T
v= 2.0m/s
How do I solve it without given Q???

2. Jul 18, 2011

### SammyS

Staff Emeritus
What do you know about an alpha particle ?

3. Jul 18, 2011

### helpme2011

Oh..I just googled it :S but does it have a charge of 3.2 x 10^-19 Coulombs? so would that just be my Q and plug that into the equation of F= QvB?

4. Jul 18, 2011

### SammyS

Staff Emeritus
Yes, an alpha particle is composed of two protons and two neutrons. The charge of a proton is 1.6*10-19 Coulombs .

Force is a vector quantity, so presumably it should also have a direction associated with it.

5. Jul 18, 2011

### helpme2011

Ok. Thanks! :)
and to find the radius, do i use the equation: a= v^2/r ?

6. Jul 19, 2011

### cupid.callin

To find radius ... the magnetic force will act as centripetal force (mv2/r)...

7. Jul 19, 2011

### SammyS

Staff Emeritus
Yes. That should work. Also, cupid's idea is equally good.

8. Jul 20, 2011