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Magnetic Forces on Charged Particles

1. Homework Statement

A particle with a charge of +8.4 µC and a speed of 55 m/s enters a uniform magnetic field whose magnitude is 0.30 T. For each of the cases in the drawing, find the magnitude and direction of the magnetic force on the particle.

21_02.gif


2. Homework Equations

B = F / [q(VsinΘ)]

3. The Attempt at a Solution

Ok, for case (a) I tried the following:

- 30 = F / [8.4*10^6(55sin30)]
- 30 = F / 27.5
- 30 * 27.5 = F
- F= 825 N

Where am I going wrong? Thanks!
 

LowlyPion

Homework Helper
3,079
4
Welcome to PF.

Remember these are vectors and the Force vector will be in what direction?

And it is determined by what scalar operation?
 

LowlyPion

Homework Helper
3,079
4
Also note your B field is .3T
 
Ah, of course. I'm not sure how I kept reading B as "30" rather than ".3" lol.

So the actual answer would be 6.93E-5.

Thanks!
 

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