A 500-W heating coil designed to operate from 100 V is made of Nichrome wire 0.500 mm in diameter. Assuming that the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used. Taken as p = 1.5x10-6 Q.m for Nichrome and T=3.14

A 500-W heating coil designed to operate from 100 V is made of Nichrome wire 0.500 mm in diameter. Assuming that the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used. Taken as p = 1.5x10-6 Q.m for Nichrome and T=3.14

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A heating element is made by maintaining a potential difference of 89.0 V across the length of a Nichrome wire that has a 4.96 x 10-6 m2 cross section. Nichrome has a resistivity of 5.00 x 10-7 2:m. (a) If the element dissipates 2880 W, what is its length? (b) If 102 V is used to obtain the same dissipation rate, what should the length be? (a) Number Units (b) Number Units
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2.8 A. What is the steady temperature of the heating element if the room temperature is 27.0 °C? Temperature coefficient of resistance of nichrome averaged over the temperature range involved is 1.70 × 10-4 °C-1.
A 460-W heating coil designed to operate from 110 V is made of Nichrome wire 0.790 mm in diameter. (Assume p 1.50 x 107 -6 0 m, and a = 4.000 x 10(°C) for Nichrome.) (a) Assuming the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used. x Your response differs from the correct answer by more than 10%. Double check your calculations. m (b) Now consider the variation of resistivity with temperature. What power is delivered to the coll of part (a) when it is warmed.to.1, 200°C? W Enter a number
A wire of Nichrome is 1.0 m long and 2.5 mm2 in cross-sectional area. It carries a current of 4.0 A. When a 12.0 V potential difference is applied between the ends. Calculate the conductivity δ of the Nichrome.
A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 x 10-6 m² cross section. Nichrome has a resistivity of 5.00 x 10-7 Q:m. If the element dissipates 5000 W, what is its length? Give your answer in cm.
A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 * 10-6 m2 cross section. Nichrome has a resistivity of 5.00 * 10-7 ohmm. (a) If the element dissipates 5000 W, what is its length? (b) If 100 V is used to obtain the same dissipation rate, what should the length be?
A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 x 10-6 m² cross section. Nichrome has a resistivity of 5.00 x 10-7 :m. If the element dissipates 5000 W, what is its length? Give your answer in cm.
A 62.4 cm length of the material has a circular cross-section of diameter 12.1 mm. When a potential difference of 87 V is placed across the length of the material, a current of 12.5 mA flows. Calculate the resistivity of the wire. Give your answer to 2 decimal places.
A heating element is made by maintaining a potential difference of 125.0 V across the length of a Nichrome wire that has 2.00x10^-6 m^2 cross section. Nichrome has a resistivity of 5.00x10^-7 Ω x m. (a) If the element dissipates 5000. W, what is its length?(b) If 100. V used to obtain the same dissipation rate, what should the length be?
A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 1.65% from its value at 20.0°C. Over what temperature range can it be used? The temperature coefficient of resistivity for Nichrome is 0.4 x 10-3 (°C)-1, 61.25 What is the expression that gives the temperature dependence of resistance? What is the ratio of R to R, if the change cannot be more than 1.65%?°C 21.25 What is the expression that gives the temperature dependence of resistance? What is the ratio of R to Ro if the change cannot be more than 1.65%?°C lower limit upper limit A jeweler uses a draw plate to stretch a wire to five times its original length. By what factor does its resistance increase? 5 What happens to the cross sectional area of the wire when the length is increased?
A tungsten wire has a radius of 0.093 mm and is heated from 20.0 to 1322 °C. The temperature coefficient of resistivity is a = 4.5 x 10 3 (Cº)-¹. When 110 V is applied across the ends of the hot wire, a current of 2.3 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire. Number i 4.408939318 Units m
Calculate the ratio of the resistance of 15.0 m of aluminum wire 2.3 mm in diameter, to 30.0 m of copper wire 1.7 mm in diameter. The resistivity of copper is 1.68 x 10–8 N. m and the resistivity of aluminum is 2.65 x 10-8 N · m. Express your answer using two significant figures.