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An induced electromotive force is produced in a coil placed near a magnet when there is a relative motion between the coil and the magnetic field. This motion causes a change in the magnetic flux passing through the coil, leading to the generation of an electromotive force according to Faraday's law of electromagnetic induction.
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Why is magnetism induced into an iron bar placed near a magnet?
When an iron bar is placed near a magnet, the magnetic field of the magnet aligns the magnetic domains within the iron bar. This alignment increases the overall magnetic field strength of the iron bar, effectively inducing magnetism in the bar.
What are some examples of induced magnets?
Some examples of induced magnets are when a piece of iron is brought close to a permanent magnet and becomes temporarily magnetized, or when an electric current flowing through a coil of wire induces magnetism in a nearby object. Magnetic induction can also occur in materials like nickel or cobalt when placed in a magnetic field.
Why is current produced in a coil if it is placed near other coil containg electricity?
When a coil carrying current is placed near another coil, it creates a changing magnetic field which induces a voltage in the second coil according to Faraday's law of electromagnetic induction. This induced voltage causes current to flow in the second coil, resulting in current being produced in the coil.
How a solenoid may be used to demagnatise a bar magnet?
To demagnetize a bar magnet using a solenoid, the magnet can be placed inside a solenoid and the current can be gradually decreased to zero. This process disrupts the alignment of magnetic domains within the magnet, leading to demagnetization. The alternating current can also be used for more effective demagnetization.
Does charge inside a conductor exert electric field on another charge placed outside the conductor?
Yes, the charges inside a conductor will rearrange when an external charge is placed near or on the surface of the conductor, resulting in an induced electric field inside the conductor. This induced electric field will influence the external charge's behavior without the need for direct contact between the charges.
Why is magnetism induced into an iron bar placed near a magnet?
When an iron bar is placed near a magnet, the magnetic field of the magnet aligns the magnetic domains within the iron bar. This alignment increases the overall magnetic field strength of the iron bar, effectively inducing magnetism in the bar.
What is Gilbert experiment?
There are several experiments known as Gilbert's Experiment, but the most common is in induced magnetism. This showed that an piece of iron became temporarily magnetic when placed on a magnet. This is why sprinkled iron on a paper over a bar magnet seems (but actually does not) show magnetic lines of force. Instead the iron particles just obey Gilbert's Law of Induced Magnetism.
In what way is the motional emf produced in a conductor placed in a magnetic field translated in to the relevant mathematical relation?
The motional electromotive force (emf) produced in a conductor moving through a magnetic field is described by Faraday's law of electromagnetic induction. The relevant mathematical relation is given by the equation ( \mathcal{E} = -\frac{d\Phi_B}{dt} ), where ( \mathcal{E} ) is the induced emf and ( \Phi_B ) is the magnetic flux. For a straight conductor of length ( L ) moving with velocity ( v ) in a uniform magnetic field ( B ), the induced emf can also be expressed as ( \mathcal{E} = B L v ). This relation illustrates the direct dependence of the induced emf on the magnetic field strength, the length of the conductor, and its velocity through the field.
A loop of wire is placed within a magnetic field If the loop of wire is stationary as is the magnetic field will a current be induced in the wire?
No it will not. In order to get electrical activity you need motion. Either the magnet or the wire must move.
How can the size of an eletrical current be increased when a magnet has been placed in the circut?
move the magnet faster
What happens When a wire with a current is placed in a magnetic field?
electricity is induced
What are some examples of induced magnets?
Some examples of induced magnets are when a piece of iron is brought close to a permanent magnet and becomes temporarily magnetized, or when an electric current flowing through a coil of wire induces magnetism in a nearby object. Magnetic induction can also occur in materials like nickel or cobalt when placed in a magnetic field.
Why is current produced in a coil if it is placed near other coil containg electricity?
When a coil carrying current is placed near another coil, it creates a changing magnetic field which induces a voltage in the second coil according to Faraday's law of electromagnetic induction. This induced voltage causes current to flow in the second coil, resulting in current being produced in the coil.
What is a example of induced magnetism?
Magnetic fields can be generated by either a permanent magnet, or generating it by electrical flow such as through a coil. If the magnet is then put near another material such as iron... the iron will then also start exhibiting an INDUCED magnetic field. Induction motors operate on this principle with the armature being non-magnetic... and the motor operates by inducing a magnetic field into the armature. Superconductors are unique that a magnet will induce an opposite magnetic field in them, and will be repulsed by the magnet.
True or false any material that exerts magnetic force is considered a magnet?
It is true that materials that exert magnetic forces are considered magnets. This is the case since it shows they have magnetic field lines that may have been induced or were naturally present in the materials.
How does a non magnetic material behave when a magnet is placed near?
A non-magnetic material will not be attracted to a magnet and will not exhibit any magnetic properties. It will not stick to the magnet or experience any noticeable changes in its behavior when the magnet is placed near it.
What is induced magnetism?
In the simplest terms, Induced Magnetism is the magnetism of an object as a result of an external influence. Typically, the external influence is a magnetic field due to another object. (One also hears the term transient magnetism applied to the same phenomenon. To be considered transient, the magnetism must disappear when the external influence disappears, but to be "induced" it just has to appear.) Though this is a technical term, it has a meaning that is the normal meaning of "induced," as in "caused by." This is to be contrasted with other modifiers, like "permanent magnetism" or "remnant magnetism" or "spontaneous magnetism" which are all still magnetism of an object but with a modifier further describing the magnetic state. If one is being more technical, then in scientific circles the term "induced magnetism" usually refers the situation where an object acquires a magnetic field as a result of it being in some external magnetic field even though it is not normally a magnetized material. One see this all the time. If you bring a permanent magnet near a collection of paperclips, then the paperclips all attach to one another and to the permanent magnet. Each paperclip has become, temporarily, a magnet. If the permanent magnet is removed, the paperclips no longer attach to one another. The magnetic properties of the paperclips were "induced" and not a permanent characteristic. More technicalities can be present with this term, because magnetism in an object can be induced in other ways than the application of a magnetic field. In the absence of such technical considerations, it is safe to assume that the term "induced magnetism" just means a temporary state of magnetization of an object induced by an external magnetic field provided by a permanent magnet or an electromagnet.
