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A current loop, by itself, does not produce a very uniform magnetic field. People use a Maxwell coil, Helmholtz coil, or a long solenoid, when they want a relatively uniform magnetic field.
What is the magnetic field in a current loop?
There are two magnetic fields in a current loop. There is the magnetic field caused by the current, such as what is found in a straight wire, and is given by B=ui/2pr where B is the magnetic field; u is the permeability constant; i is the current; p is pi; r is the radial distance from the wire. If the wire is now circular and has a radius R, then one can calculate the magnetic field inside the wire loop. Granted this is complex, but this is the idea.
The second field is perhaps a little bit more practical, but really never discussed. One can solve this problem by assuming a vector A, the current density, then take the curl of vector A, and this is the magnetic field inside the current loop. The question is what is the vector A? The current density vector inside the loop is the product ir/R and a unit vector function representing a circle. This current density is only valid for r less than or equal to R. Here the r is measured from the center of the circle. For r greater than or equal to r, the current density is the product iR/r and the unit vector function representing a circle. This is complicated by the selection of the coordinate system representing the circle. My preferance is to use spherical coordinates, but most books use Cartesian coordinates, and as such the expressions are complicated i.e., r in spherical coordinates is r but in Cartesian coordinates is (x^2+y^2+z^2)^1/2. I hope this gives some insight to the question. I do have a solution in spherical coordinates, but cannot furnish it because of my inability to use greek letters.
What else can I help you with?
Is it possible to orient a current loop in a uniform magnetic field such that the loop will not tend to rotate?
Yes, it is possible to orient a current loop so that it does not tend to rotate in a uniform magnetic field. This can be achieved by aligning the plane of the current loop perpendicular to the direction of the magnetic field. In this configuration, there will be no net torque acting on the loop, thus preventing it from rotating.
What is the induced current in the loop when a magnetic field is applied?
When a magnetic field is applied to a loop, it induces an electric current in the loop.
How is the torque on a loop of current in a magnetic field determined when considering the interactions between the magnetic field and the current loop?
The torque on a loop of current in a magnetic field is determined by the interactions between the magnetic field and the current loop. This torque is calculated using the formula x B, where is the torque, is the magnetic moment of the loop, and B is the magnetic field strength. The direction of the torque is perpendicular to both the magnetic moment and the magnetic field.
What is the direction of the induced current in a loop when there is a change in magnetic field direction?
When there is a change in the direction of the magnetic field in a loop, an induced current is generated in the loop in a direction that opposes the change in the magnetic field.
How is induced current in a loop affected by changes in magnetic field strength?
The induced current in a loop is directly affected by changes in magnetic field strength. When the magnetic field strength increases or decreases, it causes a change in the magnetic flux passing through the loop, which in turn induces an electric current in the loop according to Faraday's law of electromagnetic induction.
Is it possible to orient a current loop in a uniform magnetic field such that the loop will not tend to rotate?
Yes, it is possible to orient a current loop so that it does not tend to rotate in a uniform magnetic field. This can be achieved by aligning the plane of the current loop perpendicular to the direction of the magnetic field. In this configuration, there will be no net torque acting on the loop, thus preventing it from rotating.
For a loop of current carrying wire in a uniform magnetic field the potential energy is a minimum if the magnetic dipole moment of the loop is?
in the same direction as the field
What is the induced current in the loop when a magnetic field is applied?
When a magnetic field is applied to a loop, it induces an electric current in the loop.
How is the torque on a loop of current in a magnetic field determined when considering the interactions between the magnetic field and the current loop?
The torque on a loop of current in a magnetic field is determined by the interactions between the magnetic field and the current loop. This torque is calculated using the formula x B, where is the torque, is the magnetic moment of the loop, and B is the magnetic field strength. The direction of the torque is perpendicular to both the magnetic moment and the magnetic field.
What is the direction of the induced current in a loop when there is a change in magnetic field direction?
When there is a change in the direction of the magnetic field in a loop, an induced current is generated in the loop in a direction that opposes the change in the magnetic field.
How is induced current in a loop affected by changes in magnetic field strength?
The induced current in a loop is directly affected by changes in magnetic field strength. When the magnetic field strength increases or decreases, it causes a change in the magnetic flux passing through the loop, which in turn induces an electric current in the loop according to Faraday's law of electromagnetic induction.
How does a conducting loop move through a constant magnetic field affect the generation of electric current within the loop?
When a conducting loop moves through a constant magnetic field, it induces an electric current within the loop. This is due to the phenomenon of electromagnetic induction, where the changing magnetic field creates an electric field that drives the flow of electrons in the loop, generating an electric current.
What factors determine the magnitude of induced current in a wire loop when exposed to a changing magnetic field?
The magnitude of induced current in a wire loop when exposed to a changing magnetic field is determined by factors such as the strength of the magnetic field, the rate of change of the magnetic field, the number of turns in the wire loop, and the resistance of the wire.
How does a square wire loop behave when placed in a time-varying magnetic field?
When a square wire loop is placed in a time-varying magnetic field, an electric current is induced in the loop. This current creates a magnetic field that opposes the change in the original magnetic field, leading to a phenomenon known as electromagnetic induction.
When you loop the wire with a current it will?
increase the strenght of the magnetic field. :)
What describes the production of an electric current by moving a loop of wire through a magnetic field or moving a magnet through a wire loop?
moving a loop of wire through a magnetic Field. The rotation of a coil of copper wire trough a magnetic field changes magnetic field as "seen" from the coil inducing an alternating current.
How does Ampere's law apply to a current loop?
Ampere's law states that the magnetic field around a closed loop is directly proportional to the current passing through the loop. For a current loop, Ampere's law can be used to calculate the magnetic field strength at any point around the loop.
