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How current can be induced in a coil due...

How current can be induced in a coil due to a magnet?

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By moving a magnet towards or away from a coil, current is induced in coil.
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How current can be induced in a coil C due to another coil C'?

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Knowledge Check

  • The formula for induced e.m.f. in a coil due to change in magnetic flux through the coil is (here A = area of the coil, B = magnetic field)

    A
    `e =-A.(dB)/(dt)`
    B
    `e =-B.(dA)/(dt)`
    C
    `e =-(d)/(dt)(A.B)`
    D
    `e =-(d)/(dt)(A xx B)`

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    Name and state the rule to find the direction of : (a) current induced in a coil due to its rotation in a magnetic field. (b) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.

    Answer question numbers (a)-(d) on the basis of your understanding of the following paragraph and the related studied concepts : The phenomenon of electromagnetic induction is the production of induced current in a coil placed in a region where the magnetic field changes with time. The magnetic field may change due to a relative motion between the coil and a magnet placed near to the coil. If the coil is placed near to a current carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and conductor. The direction of the induced current is given by the Fleming's right-hand rule. What is the cause of current induced in a coil in electromagnetic induction phenomenon ?

    State the rule to determine the direction of a (i) magnetic field produced around a straight conductor-carrying current (ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it and (iii) current induced in a coil due to its rotation in a magnetic field.

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    State the rule to determine the direction of a (i) magnetic field produced around a straight conductor-carrying current, (ii) force experienced by a current -carrying straight conductor placed in a magnetic field which is perpendicular to it, and (iii) current induced in a coil due to its rotation in a magnetic field.

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