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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.


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!


Homework Helper
Welcome to PF.

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

And it is determined by what scalar operation?


Homework Helper
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.


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