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    http://filestore.aqa.org.uk/subjects...1-QP-JUN12.PDF Can someone help with Q22 please. My understanding is that the the metal with the highest resistivity for a given dimension will have the greatest resistance so the induced current will be lowest and so the induced magnetic field will be weakest and so the "push " felt by the tube will be weak so will go through much quicker. So the order is RQP. Is my reasoning correct?
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    This is completely correct
    The current is always opposing the motion, so high resistivity means high resistance, which means low current...
    Low current, low resistive upwards motion, falls through faster.
    So yes, order is RQP.
    Well answered
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    (Original post by The-Spartan)
    This is completely correct
    The current is always opposing the motion, so high resistivity means high resistance, which means low current...
    Low current, low resistive upwards motion, falls through faster.
    So yes, order is RQP.
    Well answered
    Thank You 👍🏻
 
 
 
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