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Explain "Poling"....

Explain "Poling".

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Explain the following : Poling.

A coil is hung as shown in the figure.A bar magnet with north pole facing the coil is moved perpendicularly Explain the reason for induced current.

Knowledge Check

  • When the angle of elevation of a light changes from 30^(@)" to "45^(@) , the shadow of pole becomes 100sqrt(3) m less. The height of the pole is

    A
    30m
    B
    120m
    C
    75m
    D
    236 m

  • The angle of elevation of an electric pole from a point A on the ground is 60^(@) and from a Point B towards the pole on the line joining the foot of the pole to the point A, is 75^(@) . If the distance AB = a, then the height of the pole is

    A
    `(a(3+2sqrt3))/2`
    B
    `a(4+2sqrt3)`
    C
    `(a(2+sqrt3))/2`
    D
    `(a(2sqrt3-3))/2`

  • Earth is flattened at poles and bulging at the equator . This is due to

    A
    Central force is less at the equater than at poles
    B
    Angular velocity is more at poles
    C
    Centrifugal force is more at the rquator than at poles
    D
    None of the above

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    What is poling?

    How does a solenoid behave like a magnet? Can you determine the north and south poles of a current–carrying solenoid with the help of a bar magnet? Explain.

    What is the magnetic induction at the mid-point of the straight line joining the two poles of ta horse shoe magnet , separated by a distance 'd' ? (The pole strength of each pole is 'm'. )

    Aluminium containing alumina as impurity can be refined by poling or not. Why?

    The abgular acceleration the toppling pole shown in figure is given alpha="k "sin theta , where theta is te angle between the axis of the pole and the vertical and k is a constant. The pole starts from rest at theta=0 . Choose the correct options

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