Current is flowing through a conducting hollow pipe whose area of cross-section is shown in the figure. The value of magnetic induction will be zero at

816-1021

  • A

    points $P, Q$ and $R$

  • B

    point $R$ but not at $P$ and $Q$

  • C

    $Q$ but not at $P$ and $R$

  • D

    $P$ but not at $Q$ and $R$

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