Question

explain the meaning of words electromagnet and induction in terms of electromagnetic induction list three factor on which value of induced current produced in electric circuit depends name and state the rule used to determine the direction of induced current state one practical application of this phenomenon in everyday life

Answer 1

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An electromagnetic field (also EMF or EM field) is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field

Induction is a method of reasoning in which you use individual ideas or facts to give you a general rule or conclusion. [formal] 3. uncountable noun. Induction is the process by which electricity or magnetism is passed between two objects or circuits without them touching each other

The strength of the induced current directly depends upon the following factors.

Strength of the magnetic field

Number of the turns in the coil

Relative speed between the coil and the magnet

Flemings Right Hand Rule-

The thumb is pointed in the direction of the motion of the conductor relative to the magnetic field.

                                   OR

The word "electromagnetic" means that an electric potential dipole is being produced in a coil due to change in magnetic field. The word "induction" means that the current has been induced.

The value of induced current produced in a circuit depends on the following factors :

(1) Number of turns in given coil.

(2) Area of each turn in coil.

(3) rate of change of magnetic field

The rule state that the thumb, the first and the second fingers on the right hand are held so that they are at right angles to each other. If the first finger points in the direction of the magnetic field and the thumb in the direction of the motion of the conductor then the second finger will point in the direction of the induced current in the conductor.

Electrical generator is the practical application of this phenomenon in everyday life.

Hope it helps ....