$\begin {array} {1 1} (1)\;2\sqrt2 \times 10^{-5}T & \quad (2)\;4\sqrt2 \times 10^{-5}T \\ (3)\;4 \times 10^{-5}T & \quad (4)\;2 \times 10^{-5}T \end {array}$

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( The horizontal components of earth's magnetic induction $ = 4 \times 10^{-5}T$)

$\begin {array} {1 1} (1)\;2\sqrt2 \times 10^{-5}T & \quad (2)\;4\sqrt2 \times 10^{-5}T \\ (3)\;4 \times 10^{-5}T & \quad (4)\;2 \times 10^{-5}T \end {array}$

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