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31 March, 20:00

The voltage across a conductor is increasing at a rate of 2 volts/min and the resistance is decreasing at a rate of 1 ohm/min. Use I = E/R and the Chain Rule to find the rate at which the current passing through the conductor is changing when R = 20 ohms and E = 70 volts.

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  1. 31 March, 21:53
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    3.5 amperes

    Explanation:

    I = E/R

    I = ?

    E = 70volts

    R = 20 Ohms

    Therefore, I = 70/20

    = 3.5 amperes
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