How Much Current Flows in the Circular Loop When the Net Magnetic Field Is Zero?

  • Thread starter Thread starter buckeyes
  • Start date Start date
  • Tags Tags
    Current Wires
AI Thread Summary
A long straight wire carrying a current of 0.75 A creates a magnetic field that interacts with a nearby circular loop also carrying current. For the net magnetic field at the center of the loop to be zero, the current in the loop must counteract the magnetic field produced by the straight wire. The user initially struggled to combine the relevant equations but later realized the solution was simpler than anticipated. The discussion highlights the relationship between the currents and their effects on the magnetic field. Understanding this interaction is crucial for solving similar physics problems.
buckeyes
Messages
26
Reaction score
0

Homework Statement



A very long, straight wire carries a current of 0.75 A. This wire is tangent to a single-turn, circular wire loop that also carries a current. The directions of the currents are such that the net magnetic field at the center of the loop is zero. Both wires are insulated and have diameters that can be neglected. How much current is there in the loop?


Homework Equations



http://www.webassign.net/cutnell7e/art/math/cutnell3158c21/math069.gif
http://www.webassign.net/cutnell7e/art/math/cutnell3158c21/math083.gif

The Attempt at a Solution



all i have is a picture drawn of a straight wire with a circular wire loop next to it. i know the formulas but i can't figure out how to put them together
 
Last edited by a moderator:
Physics news on Phys.org
never mind. i figured it out. it was easier then i was trying to make it. :)
 

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

Induced current and force on circular loop in varying magnetic field
Replies
4
Views
977
What is the net force on the current loop?
Replies
8
Views
2K
How Does Induced Current Change with Loop Acceleration Through a Magnetic Field?
Replies
8
Views
1K
EM fields and Current between 2 charged cylinders
Replies
10
Views
2K
Why is magnetic field B along a straight wire circular not radial?
Replies
14
Views
3K
Forces of a straight wire on a semi-circular wire loop (Magnetism)
Replies
17
Views
3K
Lenz's law: Current induced in a split loop by a changing B-field
Replies
6
Views
2K
The direction of induced current and magnetic field produced
Replies
12
Views
3K
How are the angles involved in deriving magnetic fields for a current loop?
Replies
2
Views
1K
Square copper wire loop within a magnetic field
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top