2. 13] A resistor measures 21.5 k2 at 40°C, and 20.6 k2 at 20°'C. Compute the...
A resistor has a resistance of 7 at 41.9 20°C. In 32. What is the resistance at 142.8°C? The temperature coefficient of resistivity is 4.5x103°C 1
stuck on these 2 questions 1. A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 2.53% from its value at 20.0°C. What is the highest temperature at which this resistor can be reliably used? The temperature coefficient of resistivity for Nichrome is 0.4 ✕ 10−3 (°C)−1. 2. An electronic device designed to operate at any temperature in the range from −9.9°C to 78.7°C contains pure carbon resistors. What is the percent...
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 152 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 124 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
Consider the following (a) Find the current through the resistor in the figure above. (Take R 8 2.) (b) If the resistor is made of carbon, what will its resistance be when its temperature is increased by 69.0 C°? (The temperature coefficient of resistivity for carbon is -5.0 x 10-4 (°c)-1.)
Please, no referring. A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 136 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
An aluminum wire has a resistance of 3.00 2 at 31.0°C. Determine its resistance (in 2) at 431°C. The temperature coefficient of resistivity for aluminum wire is 3.90 x 10-3 (°C)-1. (Assume that the temperature coefficient of resistivity was measured using the reference temperature 20°C.)
e2-n-c 3. (20 points) The resistivity of aluminum at 0 C has been measured to be 2.46 x 10 m. The thermal coefficient of resistivity of aluminum at -40°C is 5.18 x 10-8K-1 Aluminum has a valency of 3, a density of 2.70g cm, and an atomic mass of 27 Answer the following questions: (a). Calculate the resistivity of aluminum at 25 C; (b). What is the thermal coefficient of resistivity of aluminum at 25 C? (c). Estimate the mean...