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    What is the resistance?

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    1. An ammeter registers 2.5 A of current in a wire that is connected to a 9.0 V battery. What is the wire's resistance?
    2. A small electronic device is rated at 0.25 W when connected to 120 V. What is the resistance of this device?

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    Solution Preview

    Current (I) = 2.5 A
    Potential difference (V) = 9.0 V

    Resistance (R) = ...

    Solution Summary

    The resistance current wires are found the ammeters. The small electronic device that connects voltages are analyzed.