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Mathematics 12 Online
OpenStudy (anonymous):

The power, P, in an electric circuit is related to the voltage, V, and resistance, R, by the formula P= V^2/R. a. find the power, in watts (W), when the voltage is 100 V (volts) and the resistance is 50 ohms. b. What is the resisitance of a ciruit that uses 100 W of power with a voltage of 20 V? c. The resistance of a circuit is 15 ohms. The same circuit uses 60 W of power. Find the voltage in the circuit. GRADE 9 QUESTION

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