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Can an electromagnets strength be changed?
The more electricity the more powerful the magnetic field. Increase the voltage, which for the given resistance of the coil, will also increase the current and the magnetic field.
Uniform And Non-Uniform Magnetic field And Calculation of its strength?
The answer depends on the source of the magnetic field. For instance, the magnetic field due to a current carrying wire is given by the formula mu*I/(2*pi*r). Magnetic fields follow the principle super position so they can be added up no problem.
Do all parts of a magnet have the same force?
The simple answer is yes. The magnetic field, as with gravity, appears to emanate from the centre point. At a given distance and without interference, the magnetic field would be the same strength.
Is magnetic field strength directly proportional to the coil or the current?
The strength of a magnetic field won't be directly proportional to the turns in the coil. It is more correct to say that field strength is directly proportional to current through the windings of the coil. There are some "limiting factors" that will not allow this to be a hard and fast rule, but it is essentially correct.AnswerMagnetic field strength (symbol: H) is defined as the magnetomotive force per unit length of a magnetic circuit. As magnetomotive force is the product of the current flowing through a winding and the number of turns, then, yes, magnetic field strength is proportional to both the current and the number of turns -but this is ONLY true over the straight part of the magnetisation curve (i.e. before it goes into saturation).
Why generator produces only AC?
A generator produces electricity by moving wires through a magnetic field. The direction of the induced current is dependent upon the direction in which the wire crosses the magnetic field. In a generator the magnetic field is usually fixed - and the wires are spinning through it. So: Visualize a horizontal magnetic field. The axis of rotation of the wires is perpendicular to the field. Any given wire will be cutting up through the field at a given point... then, 180º later will be cutting down through the same field. The direction of the induced current will reverse with each half-rotation because the wire will be moving in the opposite direction relative to the magnetic field. (In the USA the generators produce "60 cycle" current. That tells you that the generators are turning their wires (coils) at 60 revolutions per second.) Richard yeaa buddie...Lickety splyt
What is the formula for calculating power if you are given magnetic field?
The formula for calculating power if you are given a magnetic field is sub 43
Can an electromagnets strength be changed?
The more electricity the more powerful the magnetic field. Increase the voltage, which for the given resistance of the coil, will also increase the current and the magnetic field.
Uniform And Non-Uniform Magnetic field And Calculation of its strength?
The answer depends on the source of the magnetic field. For instance, the magnetic field due to a current carrying wire is given by the formula mu*I/(2*pi*r). Magnetic fields follow the principle super position so they can be added up no problem.
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 --------------------------------------------
Do all parts of a magnet have the same force?
The simple answer is yes. The magnetic field, as with gravity, appears to emanate from the centre point. At a given distance and without interference, the magnetic field would be the same strength.
Generator excitation voltage?
the voltage which is given for creating magnetic field in a generator is known as excitation voltage.
Why force exerted by a magnetic field on stationary elctric dipole is zero?
The force on a charge by a magnetic field is given by F = Bq v sin@ v - the speed of the charged particle with charge q. B - magnetic field induction in tesla. @ is the angle between the velocity vector and magnetic field vector. As dipole is stationary, the speed of charges is zero. So the force = 0 Hence the result.
Why does the current carrying conductor experiences a force when it is placed in magnetic field state Fleming's left hand rule?
The force on current carrying conductor kept in a magnetic field is given by the expression F = B I L sin@ So the force becomes zero when the current carrying conductor is kept parallel to the magnetic field direction and becomes maximum when the current direction is normal to the magnetic field direction. Ok now why does a force exist on the current carrying conductor? As current flows through a conductor magnetic lines are formed aroung the conductor. This magnetic field gets interaction with the external field and so a force comes into the scene.
An electric current produces?
Produces magnetic fields, that are used in generators, inductors and motors. The magnetic field at any given point is specified by both a magnitude and a direction.
Is magnetic field strength directly proportional to the coil or the current?
The strength of a magnetic field won't be directly proportional to the turns in the coil. It is more correct to say that field strength is directly proportional to current through the windings of the coil. There are some "limiting factors" that will not allow this to be a hard and fast rule, but it is essentially correct.AnswerMagnetic field strength (symbol: H) is defined as the magnetomotive force per unit length of a magnetic circuit. As magnetomotive force is the product of the current flowing through a winding and the number of turns, then, yes, magnetic field strength is proportional to both the current and the number of turns -but this is ONLY true over the straight part of the magnetisation curve (i.e. before it goes into saturation).
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.
Susceptibility of ferromagnetic substances?
Magnetic susceptibility is the quantitative measure of the extent to which an object may be magnetized in relation to a given applied magnetic field. In ferromagnetic susceptibility, the magnetization is more than 1,000 times larger than the external magnetizing field.
