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No. EMF can only be induced in a wire by a varying magnetic flux. It does not have to be alternating, but it must be varying.
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Why transformer not produce DC current?
because transformer in made inductorAlternative AnswerTransformers are AC machines, and do not work with DC. This is because they require an alternating current to set up an alternating magnetic flux which then induces an alternating voltage into its secondary. Remember, there has to be a changing magnetic flux and a conductor for an emf. to be induced into that conductor.
Why lenz's law can be applied only to closed loops?
Lenz's law and Faraday's law of Induction.The induced current causes a magnetic field according to Ampere's law, which itself has a flux through the closed loop. According to Lenz's law, the direction of the induced current and which results in the induced magnetic flux opposes the initial magnetic flux.
What are the two main types of flux?
Types of flux - Electric and Magnetic Flux. Electric field flux through a closed surface is equal to the change enclosed in the surface, or the rate of change of magnetic flux is equal to the induced voltage around the surface.
How the process of change in magnetic flux causes induced emf?
According to Faraday's laws of electromagnetic induction, whenever a varving flux link with a conductor an emf is induced.
Does constant magnetic flux in a coil induce a current in it?
Faraday's Law: the E.M.F. induced in a conductor [the current is caused by the E.M.F.] is directly propotional to the rate of change of magnetic flux linkage.A constant magnetic flux isn't changing, so the rate of change is zero and the induced E.M.F is zero. No E.M.F. = no current.
What is the statment of lenz law?
The direction of an induced emf or current is such that the magnetic field created by the induced current opposes the change in magnetic flux that created the current.
What does the lenz law state?
The direction of an induced emf or current is such that the magnetic field created by the induced current opposes the change in magnetic flux that created the current.
How Michael Faraday discovered electromagnetic induction?
Move a magnet into a coil, and a voltage is induced into that coil, causing a galvanometer to deflect. Withdraw the magnet, and the galvanometer will deflect in the opposite direction, indicating that the induced voltage depends upon the direction of motion of the magnet.
Why voltage induced when moving coil cuts flux?
The magnetic flux passing the coil changes by its rotation thus induced emf is produced and induced current flows
When a conductor cuts magnetic flux an emf is induced in the conductor. This is known as?
faraday law
Can a magnet create electricity?
yes, when a copper wire is coiled around it and attached to a battery, an electrical current passes through it. =============================== The above is not the apt answer for the query made. Yes when a magnet is moved through a coil of wire then current is induced in it. This phenomenon is known as electro magnetic induction and current is known as induced current. This is because of change of magnetic flux linked with the coil. So whenever there is a change in magnetic flux linked with a closed circuit then current is induced in the circuit. The current lasts so long as there is change in magnetic flux. Just link of magnetic flux will not induce any current. Only the change of magnetic flux does everything. This is very very important.
Working principal of shaded pole motor?
when alternating current flows in the field winding, an alternating flux is produced in the field core.A portion of this flux links with the shading coil,which behaves as a short circuit secondary of a transformer.A voltage is induced in the shading coil, and this voltage circulates a current in it.The induced current produces a flux called the induced flux which opposes the main core flux.The shading coil thus causes a flux in the shaded portion to lag behind the flux in unshaded portion of the pole.At the same time the main flux and shaded pole flux displaced in space.This space displacement is less than 90 degree.Since there is time and space displacement between two fluxes,the conditions for setting up a rotating magnetic field is produced.Under the action of the rotating flux a starting torque is developed on the cage rotor.The direction of this flux is from unshaded to shaded portion of the pole.and the rotor moves in clockwise direction
