Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor can safely dissipate without too great a rise in temperature and hence damage to the resistor. (a) If the power rating of a 15 k 2 resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0 k resistor is to be connected across a 120 V potential difference. What power rating is required? (c) A 100.00 and a 150.00 resistor, both rated at 2.00 W, are connected in series across a variable potential difference. What is the greatest this potential difference can be without overheatin either resistor, and what is the rate of heat generated in each resistor under these

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Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor
can safely dissipate without too great a rise in temperature and hence damage to the
resistor. (a) If the power rating of a 15 k 2 resistor is 5.0 W, what is the maximum allowable
potential difference across the terminals of the resistor? (b) A 9.0 k resistor is to be
connected across a 120 V potential difference. What power rating is required? (c) A 100.0
and a 150.0 resistor, both rated at 2.00 W, are connected in series across a variable
potential difference. What is the greatest this potential difference can be without overheating
either resistor, and what is the rate of heat generated in each resistor under these
conditions?
Transcribed Image Text:Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor can safely dissipate without too great a rise in temperature and hence damage to the resistor. (a) If the power rating of a 15 k 2 resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0 k resistor is to be connected across a 120 V potential difference. What power rating is required? (c) A 100.0 and a 150.0 resistor, both rated at 2.00 W, are connected in series across a variable potential difference. What is the greatest this potential difference can be without overheating either resistor, and what is the rate of heat generated in each resistor under these conditions?
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