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What else can I help you with?
What are the methods of producing emf?
Presently, there are six known methods for producing a voltage or electromotive force (emf). Some of these methods are more widely used than others, and some are used mostly for specific applications. Following is a list of the six known methods of producing a voltage. 1. FRICTION - Voltage produced by rubbing certain materials together. 2. PRESSURE (piezoelectricity) - Voltage produced by squeezing crystals of certain substances. 3. HEAT (thermoelectricity) - Voltage produced by heating the joint (junction) where two unlike metals are joined. 4. LIGHT (photoelectricity) - Voltage produced by light striking photosensitive (light sensitive) substances. 5. CHEMICAL ACTION - Voltage produced by chemical reaction in a battery cell. 6. MAGNETISM - Voltage produced in a conductor when the conductor moves through a magnetic field, or a magnetic field moves through the conductor in such a manner as to cut the magnetic lines of force of the field.
What three factors affectthe size of induced emf?
If you are referring to the voltage induced into a conductor moving through a magnetic field, then the FOUR (not three) factors are (a) the flux density of the field (teslas), (b) the velocity of the conductor (metres per second), (c) the angle at which the flux is being cut, and (d) the length of the conductor within the field.
How can you cut an energized conductor?
With an insulated handle wire cutter.
Why transformer action can take place in DC and ac circuit?
First understand that every electrical conductor (wire) with current flow through it will produce an invisible magnetic field around it. This field is directly proportional to the magnitude of current flowing. Second (and inversely) realize that any conductor moving through a magnetic field will produce a voltage, And if provided with a complete circuit (a path to flow in) will result in current flow in that conductor. The movement can be from the conductor moving, or from the magnetic field moving, as long as there is 'relative motion' between the conductor and the magnetic field. In short, a conductor with current flow produces a magnetic field , a conductor and a magnetic field with relative motion between them produces current flow. (This is also the basis for how a motor works) AC means 'Alternating Current'! The current flow moves in one direction along a conductor, then reverses to zero and to equal magnitude in the opposite direction. Each time this current changes direction it produces a magnetic field, as it returns to zero the field collapses. As the current builds in the opposite direction the magnetic field builds again. In an AC transformer circuit, two conductors are placed in close proximity to each other and an alternating current is applied to the first conductor. This alternating current causes a magnetic field to build around the conductor, then collapse, build again in the opposite polarity and so on. This expanding and collapsing magnetic field creates relative motion between the field and the second conductor which then produces current flow of its own. This is called "transformer Action". In steady state DC circuits, the magnetic field is constant and there is normally no relative motion, therefore no "transformer action". There is however still a relative motion created when the circuit is first energized, and when it is de-energized. This collapsing field is how the ignition coil in your car works. In the simplest form, contacts (points) were opened by a cam, the open contacts de-energized the first conductor (the 12VDC primary). The resulting collapsing field cut across the secondary conductors. Because these conductors were wound into many turns or "coils" it actually multiplies the effect producing a high voltage in the secondary (connected to the ignition wires). This produced a voltage and current strong enough to jump across the gap of a spark plug. And, Yes Virginia, there is such a thing as a DC transformer.
Do tree limbs affect power lines to the house?
Yes if the wires are of the non insulated type there will be a leakage to earth, contact your power company. Get expert help, do not attempt to cut trees that touch power lines it could be fatal.
When lines of force are cut by what you have electromagnetic induction?
When magnetic flux lines of force are cut by induced voltage between magnetic and electric currents. Electromagnetic induction is created.
When lines of force are cut by a conductor you have?
When lines of force are cut by a conductor, an electromotive force (EMF) is induced in the conductor according to Faraday's law of electromagnetic induction. This induced EMF can drive an electric current to flow in the conductor, resulting in the generation of electrical power.
When lines of force are cut by a you have electromagnetic induction?
When a conductor cuts through lines of force (magnetic field), it induces an electromotive force (EMF) which generates electric current in the conductor. This phenomenon is known as electromagnetic induction, discovered by Michael Faraday. It is the principle behind the operation of generators, transformers, and many electrical devices.
What are the properties and characteristics of magnetic force?
All I can really tell you is that one of the properties of a magnetic force is called flux. They are invisable lines that, when cut or "passed through" by a copper conductor will create a small voltage...That is how the alternator in your car works.
What happens when a loop of wire cuts magnetic line of force?
When a loop of wire cuts magnetic lines of force, an electromotive force (EMF) is induced in the wire. This phenomenon is known as electromagnetic induction, and it is the basic principle behind generating electricity in generators and the functioning of electric motors. The induced current in the loop is proportional to the rate at which the magnetic lines of force are cut by the loop.
The magnitude of the voltage induced in a conductor moving through a stationary magnet field depends on the?
The speed of the conductor through the magnetic field, which translates into the number of magnetic lines of force the conductor can cut per unit time, will determine the magnitude of the voltage induced in the conductor. As an additional factor, if a longer piece of wire can be moved through the magnetic field, it will induce more voltage as well. The more speed we can put on the conductor, and the more of the conductor we can move through the magnetic field, the more voltage we can induce in the conductor.
What makes an electric current?
An electric current is the movement of the conduction band electron "gas" in a conductor. This can be induced in various ways:Application of a voltage difference across the conductor.Having magnetic flux lines "cut through" the conductor, which will push the electron "gas" perpendicular to the plane the flux lines "cut".Connecting the conductor to 2 dissimilar metals and placing the metals in an electrolyte. Corrosion of one of the metals will cause current in the conductor.etc.
Can two streamline flow cut each other?
no it is just like the intersection of two electric lines or magnetic lines of force tangent gives the direction of flow .At the point of crossing the flow will have two direction
When lines of force are cut by a what you have electromagnetic induction?
Wire.
If a conductor placed in electric field is there any emf induced in the conductor?
one condition for the above question is either conductor or magnetic field must be rotating.considering rotating field and stationary conductor,the magnetic flux will be cut up by conductor resulting in the induced emf in the conductor.
What is the best material to use in the middle of a generator?
I think the best material is ferromagnetic material , because in case of ferromagnetic material maximum number of magnetic lines of force pass through it. We know generator works on Faraday's principal of electromagnets. If the maximum no. of lines of force pass through it then when it rotate it cut maximum lines and produce better e.m.f .
Why there is an induced current in a coil when a coil is rotated between two magnets?
When a coil is rotated between two magnets, the magnetic field lines cut across the coil, inducing an electromotive force (EMF) according to Faraday's Law of electromagnetic induction. This EMF creates an induced current in the coil as the electrons inside the coil are pushed in a direction that opposes the change in magnetic field, following Lenz's Law.
