Line Current in Three Dimensions

AI Thread Summary
The discussion revolves around confusion regarding the calculation of magnetic fields in a three-dimensional context involving line currents. The poster is uncertain about the placement of angles and the interpretation of distances in their diagram, questioning whether the perpendicular distance should be from the current's starting point or the z-axis. They express concern over obtaining a negative magnetic field magnitude, wondering if this indicates a direction change. The urgency of the situation is emphasized, as the homework is due soon, and they seek clarification on the correct approach to the problem. Overall, the thread highlights the complexities of applying magnetic field equations in three-dimensional physics problems.
musiliu
Messages
43
Reaction score
0

Homework Statement



[PLAIN]http://img515.imageshack.us/img515/5139/physicsproblem.jpg

Homework Equations



in the image

The Attempt at a Solution



I don't know if i placed the angles theta1 and theta2 correctly in the diagram..I feel like this is incorrect, since the value i calculated for magnetic field is negative..and the direction is positive y, so it feels incorrect to me...

can someone do this problem and check if my answer is correct?
 
Last edited by a moderator:
Physics news on Phys.org
i really need help with this problem , i am more confused than ever:

is r perpendicular the distance from the point to the start of the current? in which case, it is sqrt(2)?
or is it the perpendicular distance from the point to the z axis? in which case it is 1...

how come i get a negative magnitude?(in my answer i just made it positive)
does that mean the direction has to be the opposite? so it has to be -y direction?

please i really need help
 
i am begging for help, the problem is due tomorrow,
the only equation i was given for magnetic field due to line current was the one i used in the image, and i don't think i am expected to solve it by deriving the bio-savart law again..i need help please
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Diffraction grating problem involving Snell's Law
Replies
3
Views
5K
Find Current with Kirchhoff's Rules
Replies
1
Views
3K
What happens to a lamp in series if lamp in parallel is broken?
Replies
12
Views
7K
Did I Solve the RL Circuit Problem Correctly?
Replies
3
Views
3K
Calculating Electric Potential for a Wire with Linear Charge Density?
Replies
2
Views
4K
Engineering Why Are My Bending Moment Signs Incorrect Using the Direct Stiffness Method?
Replies
9
Views
3K
Static Equilibrium Climber Problem
Replies
1
Views
6K
Why Are My Bending Moment Signs Incorrect in the Direct Stiffness Method?
Replies
3
Views
3K
What is the Magnetic Field at the Center of a Square Loop Carrying a Current?
Replies
2
Views
12K
Magnetic Field of rectangular current loop
Replies
8
Views
6K

Hot Threads

Recent Insights

Back
Top