## anonymous one year ago a proton is moving horizontally at 7.9 * 10^5 m/s. It passes through a vertical magnetic field that points downward. In which direction is teh proton deflected by the magnetic field? A. to the left of its velocity B, to the right of its velocity C. up D. down is this using the fourth right hand rule? :/

1. anonymous

yep

2. Michele_Laino

|dw:1434438261539:dw| since the subsequent vector equation holds: $\Large {\mathbf{F}} = - e{\mathbf{v}} \times {\mathbf{B}}$

3. anonymous

ok! what do we plug in? :/

4. anonymous

7.9 * 10^5 m/s

5. rvc

F=qvB

6. Michele_Laino

hint: |dw:1434438414300:dw|

7. anonymous

ohh so it is to the right of its velocity is our solution?

8. anonymous

yep

9. Michele_Laino

the force is pointing to left with respect to the velocity

10. anonymous

ohh so choice A is the solution?

11. anonymous

yes

12. Michele_Laino

that's right!

13. Michele_Laino

oops..sorry I have supposed it is an electron

14. anonymous

oh so it is to the right? or to the left?

15. Michele_Laino

so the right answer is to the right

16. anonymous

ooh ok yay! thanks!:)

17. Michele_Laino

:)