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A conducting rod AB moves parallel to th...

A conducting rod AB moves parallel to the x-axis (see Fig.) in a uniform magnetic field pointing in the positive z-direction. The end A of the rod gets positively charged.
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Text Solution

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When conducting rod `Ab` moves parallel to x-axis in a uniform magnetic field pointing in the position z direction, then to Fleming's left hand rule, the electrons will experience a force towards `B`. Hence, the end A wil become positive. Therefore, the statement is true.
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