Some metal conductor has a resistance of 12 ohms. When plugged into a circuit, the amount of heat 144J is released in 12s. What is the vol

Question

Some metal conductor has a resistance of 12 ohms. When plugged into a circuit, the amount of heat 144J is released in 12s. What is the voltage at the ends of the conductors?​

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Diễm Kiều 5 years 2021-08-07T09:06:11+00:00 1 Answers 22 views 0

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  1. Xavia
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    2021-08-07T09:07:23+00:00
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    Answer:

    12V

    Explanation:

    Given parameters:

    Resistance  = 12ohms

    Heat released = 144J

    Time taken = 12s

    Unknown:

    Voltage at the ends of the conductors = ?

    Solution:

    To solve this problem, we must first determine the power expended by the circuit.

    Power is the rate at which work is done;

                    P  = \frac{work done }{time}

                        = \frac{144}{12}

                        = 12W

    Electrical power is given as;

                 P  = IV  = \frac{V^{2} }{R}

                Since V is the unknown, we  solve for it;

              12  = \frac{V^{2} }{12}

               V  = 12V

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