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Excessive voltage applied

The following 1/4 W resistors are in series: 1.2 k ohm, 2.2 k ohm, 3.9 kohm, and 5.6 k-ohm. What is the maximum voltage that can be applied across the series resistors without exceeding a power rating? Which resistor will burn out first if excessive voltage is applied?

Fundamental-Of-Electrical-Circuits   
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