What is responsible for flux?

The flux is usually generated by permanent magnets or electromagnets and confined to the path by magnetic cores consisting of ferromagnetic materials like iron, although there may be air gaps or other materials in the path. horseshoe magnet with iron keeper (low-reluctance circuit)

What is basic cause of induced emf?

The most basic cause of an induced EMF is change in magnetic flux. Placing a current carrying coil that is moving constantly in a stable and static magnetic field. This will cause a change in the area vector and hence, EMF will be generated.

How does flux change with current?

Thus the magnetic flux through coil A changes with the current flowing through it. If you look at the formula for magnetic field then you will find that is the directly proportional to the current. So if the current increases the magnetic field of a current element increases and thus the magnetic flux increases.

How does current affect magnetic flux?

Current is directly proportional to magnetic force for a straight current carrying conductor in a uniform magnetic field. So the force is directly proportional to the size of the current. Practically this means the following: If the current is increased by five times the force will also increase by five times.

Why does change in magnetic flux induced current?

If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire.

How is induced current produced?

Current is produced in a conductor when it is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. The current is said to be induced in the conductor by the magnetic field. …

How does induced magnetic field affect magnetic flux in a loop?

The induced magnetic field inside any loop of wire always acts to keep the magnetic flux in the loop constant. In the examples below, if the B field is increasing, the induced field acts in opposition to it.

What are the factors that affect the induced voltage?

Number of Coils: The induced voltage is directly proportional to the number of turns/coils of the wire. Greater the number of turns, greater is voltage produced Changing Magnetic Field: Changing magnetic field affects the induced voltage.

What is the direction of induced current in magnetic induction?

– If the change in flux is due to the motion of a conductor, the direction of the induced current in the moving conductor is such that the direction of the magnetic force on the conductor is opposite in direction to its motion (e.g. slide-wire generator). The induced current tries to preserve the “status quo” by opposing motion or a change of flux.

What is the working principle of an induction motor?

It works on the principle of mutual induction, so it can operate only for alternating current. It consists of two coils wound over an iron core. AC is passed through one of the coils which we call the primary coil. Its varying magnetic flux links with the second coil called the secondary coil and induces an emf in it.