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How will the strength of the magnetic fi...

How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the straight conductor ? Give reason to justify your answer.

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The strength of magnetic field due to a current-carrying straight conductor is inversely proportional to the normal distance between the conductor and the point where magnetic field is to be determined. So as the point as moved away the strength of the magnatic field goes on decreasing.
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Draw the pattern of magnetic field lines produced around a current carrying straight conductor passing perpendicularly through a horizontal cardboard. State and apply right-hand thumb rule to mark the direction of the field lines. How eill the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the straight conductor ? Give reason to justify your answer.

(a) Draw magnetic field lines produced around a current carrying straight conductor passing through a cardboard. Name, state and apply the rule to mark the direction of thers field lines. (b) How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the straight wire carrying constant current? Justify your answer?

Knowledge Check

  • The strength of the magnetic field around a long straight wire, carrying current, is

    A
    inversely proportional to the distance from the wire
    B
    inversely proportional to the square of the distance from the wire
    C
    directly proportional to the square of the distance
    D
    directly proportional to the distance from the wire

  • The strength of the magnetic field around a current-carrying straight conductor

    A
    is same every where around the conductor.
    B
    is directly proportional to the square of distance of a point from the conductor.
    C
    is directly proportional to the current flowing in the conductor.
    D
    is inversely proportional to the current

  • The magnitude of magnetic strength at any point in magnetic field is __________

    A
    electric flux
    B
    electric flux per unit area
    C
    magnetic flux
    D
    magnetic flux per unit area

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    The strength of the magnetic field around a long straight current carrying conductor :

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