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 Ω resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0-kΩ resistor is to be connected across a 120-V potential difference. What power rating is required? (c) A 100.0-Ω and a 150.0-Ω 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?
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 Ω resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0-kΩ resistor is to be connected across a 120-V potential difference. What power rating is required? (c) A 100.0-Ω and a 150.0-Ω 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?
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 Ω resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0-kΩ resistor is to be connected across a 120-V potential difference. What power rating is required? (c) A 100.0-Ω and a 150.0-Ω 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?
What is the maximum voltage that can be applied across a 3.1-kΩ resistor rated at 1/4 watt?
Express your answer to two significant figures and include the appropriate units.
V=
A Nichrome heater dissipates 500 W when the appliedpotential difference is 110 V and the wire temperature is 800 C.What would be the dissipation rate if the wire temperature wereheld at 200 C by immersing the wire in a bath of cooling oil? Theapplied potential difference remains the same, and a for Nichromeat 800 C is 4.0 * 10-4 K-1.
The 100-bulb strand of incandescent Christmas lights is rated at 40.8W of power. When stacked, two strands consume twice the power (81.6W =2 x 40.8W) and act as two resistors in parallel to a 120V source. If the 120V source is safe guarded by a 15A circuit breaker, and the 15A circuit breaker will actually "trip" (open up) at 80% its rating (which is often the case in the real world!), how many strands can be run at the same time without tripping the circuit breaker? If you use 100-bulb strands of LED Christmas lights instead, how many strands can you run at the same time? Assume LEDs run at 1/10th the power of incandescent bulbs.
Chapter 26 Solutions
University Physics, Volume 2 - Technology Update Custom Edition for Texas A&M - College Station, 2/e
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DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY