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emf is the energy which is only there tf theur is some potential difference so no emf

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โˆ™ 2007-06-03 17:04:07
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Q: If a conductor placed in electric field is there any emf induced in the conductor?
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How was current produce or induced?

Current is induced and not produced. when an electric wire is passed through magnetic field the current is induced in the electric wire, this electric wire is enamelled copper conductor of a rotor.AnswerCurrent is never 'induced' into a conductor. It is a voltage that is induced. If that conductor is then part of a complete circuit, then the induced voltage will cause a current to flow. The induced voltage will occur even when the conductor is open circuited.


Why does emf is induced when conductor is placed in magnetic field?

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.


How does electromagnetic induction produce induced current?

Before you can understand how electrical energy is supplied by your electric company, you need to know how it is produced. A magnet and a conductor, such as a wire, can be used to induce a current in the conductor. The key is motion. An electric current is induced in a conductor when the conductor moves through a magnetic field. Generating an electric current from the motion of a conductor through a magnetic field is called electromagnetic induction. Current that is generated in this way is called induced current. To induce a current in a conductor, either the conductor can move through the magnetic field or the magnet itself can move.


How does emf is induced in a conductor?

EMF is induced in a conductor by a moving or fluctuating magnetic field.


How change in magnetic field can induce electric current in conductor?

If there is a change in a magnetic field, a current can be induced into a conducting loop. The change can occur if the strength of the magnetic field is changed, or if the conductor is moved in and out of the field.


How do you generate an electric field using a magnet?

the conductor is placed in between the magnets,the dc supply is given to the these magnets to make a electromagnets and intial motion is given to the conductor manually or electrically to cut the flux automatically emf will be induced


What is magnetic effect of electric current?

A magnetic field is induced around any conductor carrying an electric current.As explained in the Oersted Theory.


What is induced emf?

It is the voltage generated by a conductor or coil moving in magnetic field, e.g. the winding in an electric motor.


If a conductor is placed in a uniform electric field does the conductor gain any charge?

The conductor will not gain any charge that is not placed on it by you. However, the electric field will displace the free charges already within the conductor (by its nature) such that there will be a non-uniform surface charge density. Remember: a conductor must have zero electric field inside it, so the charges rearrange to cancel the external E-field. Again, this only repositions the existing charge, but it does not add or remove any charge.


What will be induced in a conductor when the conductor moves through a magnetic field?

EMF


How is voltage induced in a conductor?

According to Faraday's law, a voltage is induced in a conductor by a changing magnetic field.


The magnitude of the voltage induced in a conductor moving through a stationary magnetic field depends on the and the of the conductor?

The magnitude of the voltage induced in a conductor moving through a stationary magnetic field depends on the length and the speed of the conductor.


What is the principle of electrostatic shielding?

The method of protecting a region from the effect of electric field is called electrostatic shielding. The electric field inside the cavity of a conductor is zero. Therefore, any instrument or an appliance can be placed in the cavity of a conductor so that it may not be affected by the electric field.


What is induced by the rapid alternation of an electric field?

A magnetic field is induced by the rapid alternation of an electric field. Magnetic fields have a south and north pole.


Why induced emf alternates?

Here is A Simple answer for this question as you know that emf is induced in the conductor when there is change of flux linkage to the conductor which gives rise to the inducement of electric field in the conductor that provide drift velocity to the electrons hence emf is induced in the conductor but the last only till the change in flux in progress and becomes zero as soon as the flux linkages becomes constant hence we summaraize that for inducement of current there must be change in change of flux hence change in electric field that gives rise to allternating emf.


When is the force experienced by current carrying conductor placed in a magnetic field strongest?

The force experienced by a current carrying conductor placed in a magnetic field is strongest when that conductor is placed perpendicularly to the magnetic field.


What is induced by an electric field that changes with time?

A magnetic field


At what degree does a conductor have to pass through a magnetic field to get maximum induced current?

The induced current is maximum when the axis of the conductor, its velocity, and the magnetic field lines are all mutually perpendicular.


What is magnetic induction?

Electromagnetic induction is the process of inducing electric current in a coil with the help of a magnet.Whenever a conductor is moved through a magnetic field, or the magnetic field fluctuates in strength (as with an AC electromagnet), a current will be induced in that conductor. Induction cooktops work by passing a large AC current through a conductor under the cooktop, creating a fluctuating magnetic field which induces an electric current through the cookware - heating the cookware by electrical resistance.The process by which a substance, such as iron or steel, becomes magnetized by a magnetic field. The induced magnetism is produced by the force of the field radiating from the poles of a magnet.CommentFurther to the original answer, it is a voltage that is induced into a conductor, NOT a current.


How is induced current produced?

when a conductor moves accross a magnetic field or when magnetic field moves with respect to a stationary conductor for current to be induced, there must be relative motion between the coil and the magnetic.


When ac passes through a conductor which fields are produced a magnetic field or an electric field?

when ac passes through a conductor, the field produced is an electric field


Why there is an induced current in a coil when a coil is compressed in a magnet field?

Whenever a conductor passes through a magnetic field, a voltage (not current!) is induced.


Why electric field lines are always perpendicular to the surface of the conductor?

to save the static character of conductor in the presence of electric field


When a conductor is moved in a magnetic field a voltage will be induced on the conductor however current won't flow through the conductor unless the conductor is what?

moving


What is ment by induced current?

There is no such thing as an 'induced current'. When a conductor cuts through a magnetic field it is a potential differencethat is induced into that conductor. If the conductor forms a closed circuit (e.g. supplies a load), then a current will flow through the circuit. It is incorrect to call such a current an 'induced current'.