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Why does OCC curve become flat after certain field current?
Md Sabbir Ahmed
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How can an electric current cause an iron nail to become a temporary magnet?
By making the magnetic field around it a negative charge
Does ac current produce magnetic field?
Yes; any current produces a magnetic field, an AC current will produce an alternating magnetic field. If the current (and therefore the magnetic field) changes quickly, you may not be able to detect it with a compass needle, for example.
What do field lines show that curve toward each other show?
It has No magnetic interaction
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
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 does OCC curve become flat after certain field current Explain?
To avoid more accident
Once a current flows through the coil does it become a magnet?
ANY flowing current is surrounded by a magnetic field. The coil simply makes the magnetic field stronger.
Do field lines around a current wire look different from those around a bar magnet?
Yes. The field lines of a bar magnet emerge from one end, curve around, and stop at the other end. The field lines around a current-carrying wire are circles, with the wire passing through their centers.
How can you turn off a magnetic field by a current?
If the magnetic field is caused only by a current, you can turn the current off.If you have another magnetic field, for example due to a permanent magnet, with a current you can create a magnetic field that counters the first one. But that will only work in certain regions in space; you can't cancel such a magnetic field everywhere in space.
What is field current?
What is field current
What is the utility of plotting the occ curve of a dc generator?
Generally, the plotting of open circuit characteristics curve of a dc shunt generator is used to determine the rate of change of no-load terminal voltage(same as induced emf (Eo)) with variation in field-current( I sub. f).We find from the plot that:- a)Initially field current is zero.However due to residual magnetism at the field poles, a small amount of emf is induced.It would drive a small amount of field current according to the expression- I sub.f=Eo /R +Rsh. b)After this ,a voltage build-up process,l be observed due to strengthening of field flux & consequently,the emf. c)Finally, the magnetic poles tend to saturate.Hence, no significant flux-increment is observed w.r.t field current.Thus emf remains const. for higher values of field current.
If a conductor carrying an alternating current were formed into a coil the magnetic field that is generated?
Will cancel out and become zero
In current world what is best field?
Current world best field is IT Field.
How do relay contacts become pressed together when a current passes in the coil?
Relay contacts change state (become pressed together) when a current passes through the coil because that current causes a magnetic field to be induced which attracts the armature, to which is attached the contacts.
Why the hysteresis curve is so fat in a sample?
Hard Field
What do you need to leave school and become an engineer?
a Masters degree in a certain field of Engineers. Lots and lots of school
How can an electrical current cause an iron nail to become temporary magnet?
By making the magnetic field around it a negative charge
