Explain the meaning of the term electromagnetic induction. On what factors does the value of induced
current produced in a circuit depend ? Name and state the rule used for determination of direction of
induced current. State one practical application of this phenomenon in everyday life.
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Explanation:
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.
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Answer:
(i) The term electromagnetic induction means inducing electricity by magnetism.
The process by which a changing magnetic field in a conductor induces current in another conductor is called as electromagnetic induction.
(ii) The value of current induced in a circuit depends on the rate of change of magnetic flux linked with the closed circuit.
(iii) Fleming’s right hand rule is used to find the direction of induced current. Fleming's right hand rule states, 'Stretch the thumb, forefinger and middle finger of right hand sucha that they are mutually perpendicular to each other. If the forefinger indicates the direction of direction of magnetic field and thumb shows the direction of motion of conductor then, middle finger will show the direction of induced current.
(iv) Electric generator is an important practical application based on electromagnetic induction.
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