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A direct current I Flows along the lengt...

A direct current `I` Flows along the length of an infinitely long straight thin walled pipe then the magnetic field is

A

maximum at centre and minimum at the edges

B

uniformthroughout the pipe but not zero

C

zero form through the,axis of the pipe

D

Zero at any point inside the pipe.

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Knowledge Check

  • A current I flows along an infinitely long straight thin wall, then magnetic induction at any point inside the tube is :

    A
    zero
    B
    `(mu_(0))/(4pi)(2I)/(r)`
    C
    `(2I)/(r)`
    D
    infinite

  • Current I is flowing in a conductor shaped as shown in the figure . The radius of the curved part is r and the length of straight portion is very large . The value of the magnetic field at the centre O will be

    A
    `(mu_(0)I)/(4pir)((pi)/(2)+1)`
    B
    `(mu_(0)I)/(4pir)((pi)/(2)-1)`
    C
    `(mu_(0)I)/(4pir)((3pi)/(2)+1)`
    D
    `(mu_(0)I)/(4pir)((3pi)/(2)-1)`

  • A non-planar loop of conducting wire carrying a current I is placed as shown in Fig. Each of the straight section of the loop is of length 2a. The magnetic field due to this loop at the point P (a, 0, a) points in the direction :

    A
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    B
    `(1)/(sqrt(3))(- hat(j)+ hat(k) + hat(i))`
    C
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    D
    `(1)/(sqrt(2)) (hat(i) + hat(k))`

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