Where to Start Solving Magnetic Field of Two Wires

  • Thread starter Thread starter cwtliew
  • Start date Start date
cwtliew
Messages
1
Reaction score
0

Homework Statement



a long straight wire lying along the x-axis carries current I flowing in the +x direction. A second long straight wire lying along the y-axis carries current I/2 in the +y direction.
where is their combined magnetic field zero?

Homework Equations



Ampere's Law/biot-savart law

The Attempt at a Solution



where do i begin??
pls help.thanks.
 
Physics news on Phys.org
What is the magnetic field due to a current of wire?

Look at each of the quadrants in the xyplane... examine the direction of fields due to each of the two wires... in which quadrants are they in the same direction? in which quadrants are they in the opposite direction...

now within the quadrants where the fields are in opposite directions... you need the magnitude of the two fields to be equal (so that they cancel each other out)...

take an aribtrary point (x,y)... what is the field at this point due to the first wire... and due to the second wire... set the two fields equal... solve for y in terms of x.
 

Thread 'Initial conditions for orbits around a wormhole'

Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
View full post »

Thread 'Help to convert units of a simple formula'

The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
View full post »

Similar threads

Magnetic field of a semi infinite sheet of current
Replies
3
Views
1K
I Does a time varying magnetic field in vacuum produce electric field or not?
Replies
7
Views
1K
Infinitely long cylindrical shell (magnetic field at centre)
Replies
1
Views
5K
Off-axis magnetic field between two current-carrying rectangular loops
Replies
3
Views
3K
Magnetic field using Biot-Savart's Law
Replies
1
Views
3K
Magnetic Field of Uniformly Magnetized Infinite Slab
Replies
6
Views
2K
Calculating Magnetic Field at Point P for Perpendicular Current-Carrying Wires
Replies
2
Views
1K
Direction of Magnetic Field Outside a Cylindrical Wire
Replies
4
Views
2K
The distance where the magnetic field of two wires is zero
Replies
2
Views
4K
B-field inside a linear magnetic sphere (in a uniform external B-field)
Replies
8
Views
4K

Hot Threads

Recent Insights

Back
Top