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    Hi, how do I do this question?

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    (Original post by Turtlebunny)
    Hi, how do I do this question?

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    Hello,

    The main idea here I believe, is that the resistance decreases with temperature. When the current is flowing, the temperature increases; thereby increasing the flowing current.

    As for the second part, use Ohm's law to calculate the resistance at the minimum and maximum values for I. You can then simply substitute those values into the expression given in the question.

    I hope that this helps.
 
 
 
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