A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.00 °C, the resistance of the carbon resistor is 217.6 N. What is the temperature on aspring day when the resistance is 215,6 SO ?Take the temperature coefficient of resistivity for carbon to be a = -5.00x10-4 C-1.

The resistance dependence temperature and when the resistance is at a different temperate is given…

Answered: A carbon resistor is to be used as a…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 57PQ

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Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a current of1 = 2.00 A is accidentally passed through a R=1.00 resistor rated at 1 W, what would be the most probable outcome? Is there anything that can be done to prevent such an accident?
A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.00∘C, the resistance of the carbon resistor is 217.1 Ω . What is the temperature on a spring day when the resistance is 215.1 Ω ? Take the temperature coefficient of resistivity for carbon to be α = −5.00×10−4 C-1 .
The thermal coefficient of resistivity of iron is alpha = 5.0 x 10 ^ (- 3 / ° C), that of carbon is alpha = - 0.50 x 10 ^ (- 3 / ° C) When an iron wire and a carbon bar , both with a resistance of 10 Ω at 20 ° C, cool down to a temperature of -80 ° C, the new relationship between the resistance of the carbon rod and that of the iron wire at the lowest temperature is a.+1.9 b.-0.10 c.-10 d.+2.1 e.+10
At 20°C, the carbon resistor in an electric circuit connected to a 5.0-V battery has a resistance of 2.0 X 102 ?. What is the current in the circuit when the temperature of the carbon rises to 80°C? The temperature coefficient of resistivity for carbon is -0.5 X 10-3 ℃-1.
The temperature coefficient of resistivity for the metal gold is 0.0034 (C°)-1, and for tungsten it is 0.0045 (C°)-1. The resistance of a gold wire increases by 7.9 percent due to an increase in temperature. For the same increase in temperature, what is the percentage increase in the resistance in a tungsten wire?
A copper wire has a resistance of 0.51 Ω at 20.0°C, and an iron wire has a resistance of 0.57 Ω at the same temperature. At what temperature, in degrees Celsius, are their resistances equal? The temperature coefficient of resistivity of copper is 3.9 × 10-3 (°C)-1, while that for iron is 5.0 × 10-3 (°C)-1.
Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 0.5 mm diameter as the heating element, how long should the wire be (in unit of meters) if you want to generate 15 W of heating power? (Take the resistivity of the copper wire as p= 1.7 x 10^(-8) Ω.m)
The temperature coefficient of platinum is 3.9×10-3/C°. If a platinum wire has a resistance of R at room temperature (25°C), to what temperature (in °F) must it be heated in order to double its resistance to 2R?
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire with diameter 3.1 mm? Take the resistivity of copper and aluminum to be 1.72 x 10-8 Ωm and 2.75 x 10-8 Ωm respectively.
A copper wire has a resistance of 0.480 Ω at 20.0°C, and an iron wire has a resistance of 0.519 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 10-3(°C)−1 and for iron it is 5.00 10-3(°C)−1. _____°C
A copper wire has a resistance of 0.510 Ω at 20.0°C, and an iron wire has a resistance of 0.543 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 ×10-3(°C)−1 and for iron it is 5.00 × 10-3(°C)−1. ________ °C Hand written solution with all steps
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire with diameter 2.77 mm? Take the resistivity of copper and aluminum to be 1.72 x 10-8 Ωm and 2.75 x 10-8 Ωm respectively.

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