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Using Ampere's circuital law, obtain an ...

Using Ampere's circuital law, obtain an expression for the magnetic induction at a point near an infinitely long straight conductor carrying an electric current.

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Knowledge Check

  • Magnetic field at a distance r from an infinitely long straight conductor carrying steady varies as

    A
    `1//r^(2)`
    B
    `1//r`
    C
    `1//r^(2)`
    D
    `1//sqrtr`

  • The magnetic induction at any point due to a long straight wire carrying a current is

    A
    Proportional to the distance from the wire
    B
    Inversely proportional to the distance from wire
    C
    Inversely proportional to the square of the distance from the wire
    D
    Does not depend on distance

  • The magnitude of magnetic induction at a distance 4 cm due to straight conductor carrying a current of 10 A is

    A
    `5 xx 10^(-6) Wb//m^(2)`
    B
    `5 xx 10^(-5)` N/Am
    C
    `5 xx 10^(-5)` gauss
    D
    `5 xx 10^(-6)` tesla

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    Using Ampere's circuital law, obtain an expression for the magnetic field along the aixs of a current carrying solenoid of length l and having N number of turns.

    Calculate the magnetic field at a distance of 5 cm from an infinite straight conductor carrying a current of 10 A.

    Calculate the magnetic field at a point P. 0.5 m away from an infinitely long straight wire carrying current of 90 A.

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