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Yes. A steady current will produce a magnetic field, B= uI/r
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoI thmk yes
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What do you mean by residual magnetism in DC shunt generators?
The magnetic field that remains in a magnetic material ( a winding core) after the removal of electric power or the magnetizing force.
How does the starting of synchronous motor using dc generator as a load work-?
Starting of the synchronous motor using the DC generator creates a magnetic field.
What is the effect of field current on dc motor?
The field current of a dc motor provides the magnetic field that allows the motor to develop a torque when current flows through the armature..
What is armature in DC motor?
The armature has the stationary (not physically moving) magnetic field, which attracts the magnetic field in the rotor. Since DC does not alternate, a split ring is used to alternate the current (and resulting magnetic field), so that the rotor will spin.
Whats meant by radial magnetic field?
A radial magnetic field ensures that the plane of the coil (rotating within the magnetic field, in say a DC motor) is always flat within the external magnetic field ensuring maximum torque in (nearly) all positions. Hope this helps!
What is the classical explanation of a dc electric current in a metallic wave?
A changing magnetic field always produces an electric field, and conversely, a changing electric field always produces a magnetic field. This interaction of electric and magnetic forces gives rise to a condition in space known as an electromagnetic field.
In an electromagnet as the electric current changes what happens to the magnetic field?
the magnetic field would constantly change, that's why the AC current is converted to DC current
What do you mean by residual magnetism in DC shunt generators?
The magnetic field that remains in a magnetic material ( a winding core) after the removal of electric power or the magnetizing force.
Armature reaction in a DC generator?
ARMATURE REACTION in DC MachineAll current-carrying conductors produce magnetic fields. The magnetic field produced by current in the armature of a dc generator affects the flux pattern and distorts the main field. This distortion causes a shift in the neutral plane, which affects commutation. This change in the neutral plane and the reaction of the magnetic field is called armature reaction.
Why a current wire deflects a magnetic needle placed near it?
A current wire deflects a magnetic needle placed near it because the current wire is creating an electric field. If the current is supplied from an AC (alternating current source as opposed to DC which is direct current- AC would be from a wall socket, DC from a battery), then the current is constantly changing, so the electric field is constantly changing. A changing electric field results in a magnetic field perpendicular (90 degrees) to it. It is actually the magnetic field that is changing the needle direction, because that needle is trying to follow the magnetic field lines (similar to those that you see when you put iron filing near a magnet).
How can motion produce electrity?
When a charged particle moves through a magnetic field it experiences a force from that field. When an electrical conductor moves through a magnetic field the electrons, which are negatively charged, being moving, creating an electric current.
What is the EMF for DC machines?
Electro Magnetic Field
When does electric current behave like a magnet?
An electric current is always surrounded by a magnetic field. This is more noticeable (for example, it can be detected with a compass) in the case of DC, and if the two wires of a circuit are separate.
What are the effect of armature reaction in DC machine and how the armature reaction is minimise?
Armature reaction is the interaction between the magnetic flux produced by armature current and that of the main magnetic field in an electric motor or generator.
Will exposing a magnet to a DC magnetic field demagnetize it?
Obviously no.
Is there any rotating magnetic field in dc motors?
yeah ,if we consider a 3 phase dc motor ,the rotating magnetic field is produced by rotating the permanent magnet with a constant speed.
Is electromagnetism is possible with AC?
AC current creates an alternating magnetic field, consistent with the alternating voltage. The only way I know of using AC current to create a constant magnetic field is to rectify the AC into DC and then use that DC to create the magnetic field.
