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# Physics - Electricity Question

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A 34 ohm resistor dissipates 500 J of energy every second. What is the potential difference across it?

2. 500 J/S pretty much means 500W of power. Because 1 Watt is 1 Joule per second.

Using P = V^2/R, we rearrange to get V so that is:
PR=V^2
Hence the voltage would be the square root of (500x34) which rounds to about 130.4V

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