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mars1129 [50]
4 years ago
7

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?​
Physics
1 answer:
worty [1.4K]4 years ago
5 0

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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