Magnitude and direction a uniform magnetic field

AI Thread Summary
A user encountered difficulty solving a physics problem involving a proton moving in a uniform magnetic field. They initially used the formula B = F/qv sin(theta) but struggled with the values, particularly the mass of the proton. Guidance was provided on employing the right-hand rule and vector math to determine the magnetic field's magnitude and direction. Ultimately, the user resolved the issue by correctly incorporating the proton's mass and applying the right-hand rule effectively. The discussion highlights the importance of understanding fundamental concepts in magnetism and the utility of problem-solving techniques.
physics_ash82
Messages
18
Reaction score
0
magnetism

Hi I'm stuck on this problem I its got to be something simple.Here goes...

A proton moves perpendicularly to a uniform magnetic field B at 1.0x10^7 m/s and exhibits an acceleration of 2.0x10^13m/s^2 in the + x-direction when its velocity is in the + z-direction. Determine the magnitude and direction of the field.

I have been trying to use B= F/qvsin(theta)
theta = 1
q = 1.6x10^-19


and then I have the problem :blushing: So any other help would be useful thankx

ash
 
Last edited:
Physics news on Phys.org
Think about the use of the right hand rule and think it through. If our not to secure with that and you aregood at vectors math, try working out the cross products and such. If your still stuck let us know what's up.

P.S; the magnitude is given.
 
The right hand rule is a great tool if used. Try to use it to work out the problem, it makes things so much simpler.
 
Thanx

I figured it out I was using the right formula and had forgotten that the mass of the proton is 1.67x10^-27 and I was using the charge which was 1.6 x10^-19.. but thank you for the idea on right hand rule that helped with the 2nd part.

ash:smile:
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Non-Uniform Magnetic Field Calculations
Replies
9
Views
2K
Direction and magnitude of electric field produced by current change
Replies
8
Views
1K
Magnetic field pointing into a normal magnetized compass needle
Replies
16
Views
1K
Understanding work in translation and rotation of a magnetic dipole
Replies
1
Views
2K
Calculating Area & Direction of Magnetic Field
Replies
9
Views
2K
Direction of the magnetic needle
Replies
11
Views
2K
Understanding Torque in a Magnetic Field with Loop
Replies
37
Views
4K
Does a Bent Wire Affect Induction Calculations?
Replies
7
Views
2K
Find the magnitude of the electromagnetic force on electron?
Replies
3
Views
2K
Determining the direction of the magnetic field
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top