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Why does OCC curve become flat after certain field current?
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What is Flleming's right hand rule?
Fleming's right-hand rule is a way to determine the direction of the force experienced by a current-carrying conductor in a magnetic field. Point your right thumb in the direction of the current, and your fingers will curve in the direction of the magnetic field, giving the direction of the force.
How can an electric current cause an iron nail to become a temporary magnet?
When an electric current flows through a wire wrapped around an iron nail, a magnetic field is created. This magnetic field aligns the magnetic domains within the iron nail, causing it to become magnetized. Once the current stops, the magnetic field dissipates, and the nail loses its magnetism.
How is an electromagnet able to pick up certain metal objects?
An electromagnet creates a magnetic field when an electric current flows through it. This magnetic field interacts with the metal objects, causing them to be attracted to the electromagnet and subsequently picked up. The strength of the magnetic field can be controlled by adjusting the current flowing through the electromagnet, allowing for selective picking up of certain metal objects.
What happens when electric current passes through a spring?
When electric current passes through a spring, the spring can become magnetized. The magnetic field generated by the current induces a magnetic field in the spring, causing it to act like a magnet. This magnetic property can be harnessed in various applications, such as in electromagnets or speakers.
When a current flows through the coil does it become a magnet?
Yes, when a current flows through a coil of wire, it generates a magnetic field around the coil, making it act like a magnet. This phenomenon is known as electromagnetism. The strength of the magnetic field can be controlled by changing the amount of current flowing through the coil.
Why does OCC curve become flat after certain field current Explain?
To avoid more accident
Why does the magnetizing curve of shunt generator tend to become horizontal after a certain value of field current?
The magnetizing curve of a shunt generator becomes horizontal after a certain value of field current due to magnetic saturation of the iron core. As the field current increases, the magnetic flux also increases, but once the core reaches saturation, additional increases in current result in only marginal increases in flux. This leads to a flattening of the curve, indicating that the generator's ability to produce additional voltage is limited despite increased field current. Essentially, the magnetic material can no longer effectively respond to changes in current due to its saturation.
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.
What is Flleming's right hand rule?
Fleming's right-hand rule is a way to determine the direction of the force experienced by a current-carrying conductor in a magnetic field. Point your right thumb in the direction of the current, and your fingers will curve in the direction of the magnetic field, giving the direction of the force.
Why is required to vary the field current in one direction while performing the open circuit test?
Varying the field current in one direction during the open circuit test helps establish a consistent magnetic field in the machine, allowing for accurate measurement of the generated voltage. This method ensures that the relationship between field current and voltage is linear and helps avoid hysteresis effects that could arise from reversing the field current. Additionally, it simplifies the analysis of the machine's performance characteristics, such as the voltage regulation curve.
How can an electric current cause an iron nail to become a temporary magnet?
When an electric current flows through a wire wrapped around an iron nail, a magnetic field is created. This magnetic field aligns the magnetic domains within the iron nail, causing it to become magnetized. Once the current stops, the magnetic field dissipates, and the nail loses its magnetism.
What is field current?
What is field current
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 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.
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.
