Thermistors are semiconductors used for measuring temperature. The electri- cal resistance of a thermistor changes with temperature. One model for the et- fect of temperature on a specific thermistor is R = 2,252e4000(-3.16), where R is the resistance in ohms and T is the temperature in K. You can verify that this thermistor has a resistance of 2,252 at 25°C = 298.16 K. For the data below, calculate the correlation coefficient for the model and decide whether the model fits the data well or not. Temperature (°C) Resistance (2) 7,850 10 4,400 2,900 20 1,500 1,000 30 40

Thermistors are semiconductors used for measuring temperature. The electri- cal resistance of a thermistor changes with temperature. One model for the et- fect of temperature on a specific thermistor is R = 2,252e4000(-3.16), where R is the resistance in ohms and T is the temperature in K. You can verify that this thermistor has a resistance of 2,252 at 25°C = 298.16 K. For the data below, calculate the correlation coefficient for the model and decide whether the model fits the data well or not. Temperature (°C) Resistance (2) 7,850 10 4,400 2,900 20 1,500 1,000 30 40

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Q1: A copper cable is 2 km long and has across-sectional area of 10 mm². Find its resistance at 80°C if at 20C the resistivity of copper is 0.02x10-6 2.m and its temperature coefficient of resistance is 0.004/•C.
An electrical circuit consisting of six resistors with a power supply. Apply Norton's theorem steps to calculate: 40 www C) Current through 5 resistor of circuit below. 80 www a 40 100 20V ww 502-
46. Find the governing differential equation for temperature distribution in spheres with symmetry in 0 and ø directions. [Ans. 1/r dldr(rdTldr) + ġ" Ik = 0].
A RTD made up of platinum has a =0.00385 and has a initial resistance of 400. Find the value of resistance Rt for the following temperatures. Temperature Resistance (Rt) 270 470 1.Resistance (Rt) at Temperature 270°C = 2. Resistance (Rt) at Temperature 470°C =
%^0 |. دردشة هندسة النفط/مسائي A composite wall consisting of five series layers of materials with different properties. Layer thickness, thermal conductivity of the layers and temperatures are shown on the figure. Based on Fourier's law for conduction, answer the following questions. 1. What are the main assumptions? 2. Drive an equation to calculate the heat transfer rate through the Composite wall? 3. Draw the themal circuit through composite wall? 4. What are the value Ti? 5. What are the value Tj? 6. What are the value Tr? Givens: KA = 2 W/m. °C K= 1 W/m.°C K= 5 W/m. °C Kp= 4 W/m, °C 100°C Ti 25°C Tj Tr A B D -2cm e 6 cm 4 cm 4cm إضافة وصف...
An external wall of a building has a U value of 0.50 W/m^2K. The indoor temperature is21 degrees C and the outdoor temperature is -2.0 degrees C The steady-state heat loss is calculated to be 11.5W/m^2 The wall contains a layer of insulation 40 mm thick with a conductivity of0.035 W/mK. What would the insulation thickness need to be in order toreduce the steady state heat loss by 50%? answer = 0.11m please show all working
kitchen oven has a dial thermometer with a resolution of 10 degrees. The error caused by interpolation due to the use of this dial thermometer is 95% expected to be:
(2) or ane-dimensional h 530K MaterialI Material II d= k iscuss the analogie quations. What is the 310K Give three 3) 0.Sm Determine 4) Swo-hour period & and the conductivity of I is 52 W m' K'. 5) At steadu (3) Describe the N-type interaction and the U-process collisions in solids. of 大"我 Determine tE conductivity At steady state, the in a thus:
An electrical circuit consisting of six resistors with a power supply. Apply Norton's theorem steps to calculate: B) The Norton Equivalent circuit 40 www 80 www a 40 100 20V ww 502-
:D docs.google.com/forms :QT: Choose the correct answer نقطة واحدة The minus sign in Fourier's law is necessary because heat is always transferred in the direction of increasing temperature O decreasing temperature össlg äbäs The thermal resistance of the : wall is given by kL/A O None k/AL O L/kA O نقطة واحدة With composite walls it is often convenient to work with an overall heat transfer coefficient U, which is
A resistance-capacitance relaxation circuit is used in an electrical discharge machining process. The discharge voltage is 100 V. At a spark cycle time of 25 us, the average Power input required is 1 kW. The capacitance (in μF) in the circuit is
0.6. The resistance of a certain size of copper wire is given as. R = Ro[1 + a(T-20)] %3D where Ro-60+0.3 percent is the resistance at 20°C, a=0.004°C-1+1 percent is the temperature coefficient of resistance, and the temperature of the wire is T=30°C + 1 percent. Calculate the resistance of wire and its uncertainty.