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Statement I : A magnetic needle which ca...

Statement I : A magnetic needle which can rotate in a horizontal plane undergoes a deflection when current is passed through a conducting wire, placed above and parallel to it.
Statement II : A magnetic field is developed around a current carrying conductor.

A

Statement I is true, statement II is true, statement II is a correct explanation for statement I.

B

Statement I is true, statement II is true, statement II is not a correct explanation for statement I.

C

Statement I is true, statement II is false.

D

Statement I is false, statement II is true.

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Statement I : A long straight conductor attracts iron filings when a current is passed through it. Statement II : A magnetic field is developed around a current carrying conductor.

    A
    Statement I is true, statement II is true, statement II is a correct explanation for statement I.
    B
    Statement I is true, statement II is true, statement II is not a correct explanation for statement I.
    C
    Statement I is true, statement II is false.
    D
    Statement I is false, statement II is true.

  • The magnetic field developed at a point near a straight current carrying conductor depends on

    A
    material of the conductor
    B
    distance of point from the conductor
    C
    direction and magnitude of current
    D
    medium between the point and conductor

  • A magnetic needle facing north-south can roatate freely in a horizontal plane. A conducting wire is placed parallel to it along north-south direction.

    A
    Direction of current is from south to north and the conductor is above the magnet-north pole of the magnet will be deflected towards west.
    B
    Direction of current is from north to south, the conductor is above the magnet-south pole of the magnet will be deflected towards west.
    C
    Direction of current is from south to north, the conductor is below the magnet-south pole of the magnet will be deflected towards west.
    D
    Direction of currnet is from north to south, the conductor is below the magnet-the north pole of the magnet will be deflected towards west.

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    A moving charged particle is not deflected when it passes through a region. Can it be said that no magnetic field exists in that region?

    A circular coil of radius 20cm and 20 turns of wire is mounted vertically with its plane in magnetic meridian a small magnetic needle is placed at the centre of the coil and it is deflected through 45^@ when a current is passed through the coil horizontal componenet of earth's field is 0.37xx10^(-4) T the current in coil is

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