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When the rotational speed of a rotating system doubles its angular momentum?
Gets doubled
If the amplitude of a system moving in simple harmonic motion is doubled which quantity associated with it does not change?
period
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.
Why most practical energy conversion devices used magnetic field as the coupling medium between electrical and magnetic system?
answer
What happens to the speed of a moving object when it is doubled?
Acceleration is doubled. F = ma, where m is mass and a is acceleration. If mass is halved, acceleration is changed by a related quantity, X in this equation. F = (1/2m)(Xa) The coefficients before mass and accelerations have to equal 1 if force stays the same, so... 1/2*X=1 X = 2 therefore, acceleration is doubled.
How does a generator exciter work?
Exciter controls the magnetic field in the generator system and controls the output voltage and/or current.
What happens when a wire is looped into a coil?
When you wind a current carrying wire into a coil, it causes the concentration of the magnetic field line to intensify. Depending on which pole of the magnet is in the up position, the wire will move towards or bend away from it.
What is idmt over current relay with different plug setting multiplier?
Any nonlinear load on a system generates harmonics. Exampes are the magnetic core of a transformer or equipment which uses rectifiers to produce direct current. The triplen harmonics are unpopular because they add on a three-phase system, so they produce current in the neutral, which a three-phase system in balance does not.
Why skin effect absent in dc system?
Skin effect is caused by the back emf produced by the self induced magnetic flux in a conductor. For a DC current, the rate of change of flus is zero, so there is no back emf due to changes in magnetic flux. Therefore, the current is uniformly distributed throughout the cross section of the conductor.
When the rotational speed of a rotating system doubles its angular momentum?
Gets doubled
What cause the sun's magnetic field?
Magnetic fields are created by electric currents that are spread throughout the entire solar system. This current causes the sun to ebb and surge on its surface. The polarity of the field is flipped when at its peak during a peak of high sunspot activity.
According to the ideal gas laws what happens to the volume of a gas when the number of moles doubles?
The product PV remain constant in a closed system at constant temperature.
Why does the changing magnetic flux in a conducting loop always induced a current that generates field opposing the change in flux?
Free electrons in the conducting carry a charge, and electrons are influenced by magnetic waves. Thus if a magnetic wave is generated by the changing field, electrons will feel the influence. Since the system is naturally stable it will resist changes, and thus it opposes the influence. The current flowing in the conductor will generate a field opposing the incoming field.
How planets rotate on there axis?
Planets that have a magnetic field have: 1) Contains magnetic material like iron, ionized gases, hematite, or magnetite. 2) Has a magnetic current going thru the material. If the planet does not contain enough magnetic material or the material does not have enough magnetic current, there is no magnetic field.
What happens when you place a bar magnet on a saucer and place the saucer in a bucket of water?
The floating saucer-magnet system become a compass, and it will line up with the earth's magnetic field.
Explain the term co-energy in magnetic system?
Coenergy is sort of a dual of stored energy that is often used to compute forces on systems with permanent magnets and current-carrying coils.
Which best describes search north magnetic pole?
In our solar system has magnetic pole reversal
