Electric currents and Magnetic fields

AI Thread Summary
The discussion centers on the effects of a current-carrying wire on a neutral copper rod, a polarized insulator rod, and a bar magnet. It is established that the magnetic field generated by the current will cause the bar magnet to align with it, while the neutral copper rod and polarized insulator rod will remain stationary. The polarized insulator rod is influenced by the current, but the neutral copper rod does not experience movement due to the magnetic field. There is uncertainty regarding whether the electric field of the current affects the copper rod's polarization. The conversation also touches on the concept of diamagnetism and the relationship between current and polarization.
SDTK
Messages
30
Reaction score
0

Homework Statement


A Neutral copper Rod, a polarized insulator rod, and a bar magnet are arranged around a current-carrying wire.
Will the neutral copper rod, polarized insulator, and magnet remain stationary?

Homework Equations


does the electric field of the current carrying wire have an effect on the neutral copper rod? ie will it become polarized?

The Attempt at a Solution


(The N pole of the bar magnet is arranged so that it oriented toward the current carrying wire.) The bar magnet will rotate so that the N pole aligns with the direction of the magnetic field.

The magnetic field does not effect (cause movement of) the neutral copper rod, or the polarized insulator rod.

The insulator rod is polarized because of the current in the wire. --- I do not believe that it will not move, ... unless the the copper rod becomes polarized... my uncertainty of how the Electric Field of the current carrying wire affects the neutral copper rod is the basis of my question--
 
Physics news on Phys.org
SDTK said:
does the electric field of the current carrying wire have an effect on the neutral copper rod? ie will it become polarized?
Did you mean magnetic field? There is an electric field inside the current-carrying wire, but all it does is push electrons from one end to the other. I believe this question is about the effects of the magnetic field set up by the current in the wire.
SDTK said:
The magnetic field does not effect (cause movement of) the neutral copper rod
Check out "diamagnetism".
SDTK said:
The insulator rod is polarized because of the current in the wire.
Are you saying that if the current is turned off the insulator will stop being polarized? What relevant equation relates the polarization to the current?
 
  • Like
Likes SDTK
kuruman said:
Did you mean magnetic field? There is an electric field inside the current-carrying wire, but all it does is push electrons from one end to the other. I believe this question is about the effects of the magnetic field set up by the current in the wire.

Check out "diamagnetism".

Are you saying that if the current is turned off the insulator will stop being polarized? What relevant equation relates the polarization to the current?

:-) thank you, for both the comments regarding the question, and the suggestion to check out diamagnetism.
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
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

Motional EMF in the presence of a time-varying magnetic field
Replies
11
Views
3K
What is the net force on the current loop?
Replies
8
Views
2K
Calculating Magnetic Field at Point P for Perpendicular Current-Carrying Wires
Replies
2
Views
1K
Why is magnetic field B along a straight wire circular not radial?
Replies
14
Views
3K
Magnetic field pointing into a normal magnetized compass needle
Replies
16
Views
1K
Magnets near a current carrying wire
Replies
12
Views
2K
Multiple choice Q: Mangetic fields and Spring Constant
Replies
8
Views
2K
Deduction about Magnetic Poles surrounding a Conductor
Replies
40
Views
3K
Two concentric conducting spherical shells and resistor in between
Replies
44
Views
4K
Direction and magnitude of electric field produced by current change
Replies
8
Views
1K

Hot Threads

Recent Insights

Back
Top