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    Jenesco1's Avatar
    Jenesco1 Posts: 4, Reputation: 1
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    #1

    Feb 22, 2011, 04:36 PM
    Potential difference, Current, Resistance
    A source of variable potential difference is attached across the ends of 1 m of resistance wire and the potential difference across the wire is steadly increased.
    a) Describe how the current through the wire changes
    b) Provide the temperature of the wire does not change significantly, what radio is constant as the potential difference across the wire increased?

    (Variable potential difference = Voltage)
    Thank You!
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Feb 23, 2011, 09:48 AM

    a) The wire has a constant resistance. So, apply Ohm's Law, and the formula:

    V = IR

    b) It's ratio, not radio. Use the formula I just gave you to guess that answer :)
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