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How can it be shown that a magnetic fiel...

How can it be shown that a magnetic field exists around a wire through which a direct current is passing?

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A compass needle placed near the wire, through which current is flowing, gets deflected, thereby showing the magnetic field around it.
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The magnetic field produced around a straight line wire when current flows through it is

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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 magnetic field produced around a straight line wire when current flows through it is

    A
    parallel to the wire.
    B
    perpendicular to the wire.
    C
    in the form of concentric circle.
    D
    parabolic line.

  • The direction of the magnetic field around a straight conductor carrying current is given by …………..

    A
    the right hand thumb rule
    B
    Fleming's left hand rule
    C
    Fleming's right hand rule
    D
    none of these
    • PRADEEP-MAGNETIC EFFECTS OF ELECTRIC CURRENT-Mock Test
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    3. On what factors does the force experienced by a current-carrying condu...

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    4. State two ways by which the strength of an electromagnet can be increa...

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    5. What is the difference between an electromagnet and a permanent magnet...

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    7. How can a soft iron piece be transformed into an electromagnet? Draw a...

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    8. Why does a compass needle get deflected when brought near a bar magnet...

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    9. The flow of a current in a circular loop of a wire creates a magnetic ...

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    10. What are magnetic field lines? How is the direction of magnetic field ...

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    11. Why is series arrangement not used for domestic circuits?

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    12. State the characteristics of magnetic force.

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    13. Though currently there is little scientific evidence to suggest that m...

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    18. Explain with a labelled diagram, the principle, construction and worki...

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