Magnetic field due to wire and conducting plane

AI Thread Summary
The discussion centers on calculating the magnetic field produced by a current-carrying wire that spreads radially along a conducting plane. The user seeks clarification on why the magnetic field is zero below the plane and how to derive the field above the plane as μI/2πx. They initially used Ampere's law to find the magnetic field from the wire but are confused about the contribution from the conducting plane. Participants suggest using Ampere's law effectively and emphasize the significance of the plane's properties in determining the magnetic field in different regions. The conversation highlights the complexities of applying electromagnetic principles to this specific configuration.
bsdnoob
< Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown >[/color]

This problem is bugging me since a week so I decided to post this here

Suppose we have a wire with some current 'I' and which at a point 'o' spreads radially in all direction along conducting plane perpendicular to wire so what will be magnetic field at above and below plane?Here's the diagram
MTWNpFM.jpg

My approach to this problem was to find magnetic field due to individual current carrying elements . For wire I used Ampere's law to find it as B= (mu) . I /4πx (for half infinite wire)but I am confused about it from conducting plane ? Answer is given to be 0 for region below plane , how is this possible? And for above plane is given (mu)I/2πx but how? can someone help?
This problem is given in irodov's general physics book. (3.232)
 
Last edited by a moderator:
Physics news on Phys.org
bsdnoob said:
(for half infinite wire)
Why half?
 
Using Ampere's law sounds like a good approach. Can you explain in detail how you set up Ampere's law to get your answer?
 

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 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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

Magnetic field pointing into a normal magnetized compass needle
Replies
16
Views
1K
Induced current and force on circular loop in varying magnetic field
Replies
4
Views
968
A curved wire rotating in and out of a magnetic field
Replies
21
Views
2K
Direction of the magnetic needle
Replies
11
Views
2K
Why is magnetic field B along a straight wire circular not radial?
Replies
14
Views
3K
Magnetic field due to electric wire
Replies
6
Views
1K
Calculation of torque and force on magnetic dipole near infinite wire
Replies
3
Views
1K
Induced charge on a conducting sphere sliced by a plane
Replies
2
Views
1K
Magnetic field created by a wire
Replies
5
Views
2K
Magnetic field at origin due to infinite wires and semicircular turn
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top