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How may a coil carrying current increase magnetic flux density?
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If the volume of an object increases what will the density do?
it will increase. the epuation for density is mass divided by volume.
What happens to density when volume or mass is affected?
Density = Mass / Volume Therefore: Increase in Mass --> Increase in Density Increase in Volume --> Decrease in Density and Vice Versa.. :) Hope this helped
How uniform is magnetic field in current loop?
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 are sources of error when obtaining earth magnetic flux density experiment?
suggestion of the improvement in experiments magnetic flux?
What is the definition of electro magnetic induction?
Magnetic induction is the process in which an item is magnetized by an external magnetic field. The force of the fields comes from the poles of the magnet to produce the magnetism. The process is also called magnetic flux density.
When a magnetic field is parallel to a current-carrying wire what is the force on the wire?
there is no force on the wire as the magnetic flux density on both sides of the conductor is the same. So, there is no net force on the wire
An increase in ocean salinity can increase what creating a current?
An increase in ocean salinity can increase density creating a convection current.
How do you calculate the magnetic field strength in an injector cyclotron?
- Magnetic field strength is the intensity of a magnetic field at a given location. Historically, a distinction is made between magnetic field strength H, measured in ampere/meter, and magnetic flux density B, measured in tesla. Magnetic field strength is defined as the mechanical force (newton) on a wire of unit length (m) with unit electric current(A). The unit of the magnetic field, therefore, is newton/ (ampere x meter), which is called tesla. The magnetic field may be visualized by magnetic field lines. The field strength then corresponds to the density of the field lines. The total number of magnetic field lines penetrating an area is called magnetic flux. The unit of the magnetic flux is tesla x m2 = weber. The older units for the magnetic flux, maxwell = 10-8 weber, and for the magnetic flux density, gauss = maxwell / cm2 = 10-4 tesla, are not to be used any more. Magnetic flux density diminishes with increasing distance from a straight current-carrying wire or a straight line connecting a pair of magnetic poles around which the magnetic field is stable. At a given location in the vicinity of a current-carrying wire, the magnetic flux density is directly proportional to the current in amperes. If a ferromagnetic object such as a piece of iron is brought into a magnetic field, the "magnetic force" exerted on that object is directly proportional to the gradient of the magnetic field strength where the object is located. ------------------------------------------------------------------- B=μH Magnetic field in Solenoid B=μnI where n is turns/m So H=nI --------------------------------------------
What is the limit for magnetic field developed for a DC machine?
The magnetic field used in machines is quantified in terms of its flux density (symbol: B), expressed in teslas. The flux density is established by the magnetic field strength (H), expressed in amperes per metre, set up in the field windings.As the magnetic field strength increases, the flux density increases until it reaches saturation. This is the point when the magnetic domains within the magnetic circuit are all aligned. At this point, any further increase in magnetic field strength will fail to increase the flux density.So saturation of the magnetic circuit limits the flux density of the field.
What kind of density current is caused by muddy rapidly flowing mixture of sediment and water?
A turbidity current is a density current that occurs when mud or silt mixes with seawater. This is the result of the increase in the density of the water itself.
Why inductance of a coaxial cable is expected to increase when the radius of the outer conductor is increased?
Because there is more room in the cable for the magnetic field to form. The magnetic flux density is set by the current in the cable, and with a bigger space that flux density produces more actual flux. The inductance is the flux divided by the current, so a wider cable has more inductance. But if the inner conductor is also increased in size by the same ratio, the effect is negated and the inductance is the same as before.
What is Magnetic flux density unit?
"Magnetic flux density" is also known as the magnetic field,The SI unit for this is the Tesla, written as T.CommentMagnetic flux density is not "also known as the magnetic field". It describes the intensity of a magnetic field.
How does a D.C.motor work?
A motor is an electrical machine which converts electrical energy into mechanical energy. The principle of working of a DC motor is that "whenever a current carrying conductor is placed in a magnetic field, it experiences a mechanical force". The direction of this force is given by Fleming's left hand rule and it's magnitude is given by F = BIL. Where, B = magnetic flux density, I = current and L = length of the conductor within the magnetic field. Fleming's left hand rule: If we stretch the first finger, second finger and thumb of our left hand to be perpendicular to each other AND direction of magnetic field is represented by the first finger, direction of the current is represented by second finger then the thumb represents the direction of the force experienced by the current carrying conductor. When armature windings are connected to a DC supply, current sets up in the winding. Magnetic field may be provided by field winding (electromagnetism) or by using permanent magnets. In this case, current carrying armature conductors experience force due to the magnetic field, according to the principle stated above. Commutator is made segmented to achieve unidirectional torque. Otherwise, the direction of force would have reversed every time when the direction of movement of conductor is reversed the magnetic field.
Why is a electromagnet not a permanent magnet?
An electromagnet only retains major magnetic properties when a current is being run through it.AnswerWhether a material makes a permanent or temporary magnet depends on the nature of the ferromagnetic material involved. For example a coil with a steel core will retain much of its magnetic flux density when the current is switched off, whereas a coil with an iron core will lose most of its magnetic flux density when the current is switched off.
Determine the effect of variable area to the magnetic flux within the solenoid at constant number of windings and current?
With constant number of windings and current, the magnetic field density of a solenoid remains constant. However, magnetic flux is determined by the flow of magnetic field force through a given area. Therefore, the area is linearly and directly proportional to the magnetic flux.
What is the Hall effect?
If a semiconductor carrying a current ( I ) is placed in a transverse magnetic field ( B ), an electric field ( E ) is induced in the direction perpendicular to both I & B.This is called hall effect.for full explanation visit http://www.ecematerials.com/2013/07/hall-effect.html
What is the saturation of a permanent magnet generator?
The term, 'saturation', applies to all ferromagnetic materials including the magnetic circuits used in machines. Saturation refers to a situation where a material's magnetic field has achieved its maximum intensity.If a length of insulated wire is wound around a ferromagnetic material, and a current passed through it, that material will become magnetised. In the case of 'soft' materials, such as iron, this is only temporary and will disappear (almost) when the current is switched off. But with 'hard' materials, such as steel, the magnetism will be retained. In this sense, the terms 'soft' and 'hard' refer to the magnetic properties of the material, and not the literal sense!So, when current is passed through the wire, we end up with what is called a magnetic field strength (symbol: H), defined in terms of the magnetomotive force (current times the number of turns) per unit length (in metres) for the magnetic circuit, and expressed in amperes per metre (usually spoken as 'ampere-turns per metre'). If the current is increased, then the intensity of the resulting magnetic field, i.e. its magnetic flux density (symbol: B) will also increase. But it will not increase indefinitely, rather it will reach a point called 'saturation' at which point any further increase in magnetic field strength will result in absolutely no further increase in the flux density of the field. This is the point at which saturationhas been reached.If you think of a ferromagnetic material being made up of billions of molecules which behave like tiny, individual magnets (we call these 'domains'), in the unmagnetised state these are chaotically orientated and, so, the material is unmagnetised. When magnetised, these domains align in a north-south direction and, once aligned, the material has reached its maximum flux density and we say that it is 'saturated'.
