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The power rating of a resistor is the maximum power it can safely dissipate without getting too hot. Suppose you have a set of 5.30 Omega, 10.8 Omega, and 20.1 Omega resistors, all rated at 2.40 W. If you connect these three resistors in series across a variable emf source of negligible internal resistance, what is the largest potential difference this emf source can be set to without damaging any of the resistors?

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