Distinguish the characteristics of the Resistance Temperature Detector (RTD) and Thermistor.
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A: R1=2.03Ω R2=1589.4986Ω R3=0.0177ΩExplanation:
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- Nichrome wire of cross-sectional diameter 0.499 mm is to be used as a so-called heater wire. The required power is 38 W, and we have a 25-V power supply. How long does the wire need to be?Three resistors are made out of three different materials and have different (but uniform) cross sections. Resistor 1 has a circular cross section of radius 1.18 mm . Resistor 2 has a square cross section with a side length of 4.77 mm . The third resistor's cross section is a right triangle with two sides of length 1.62 mm . All of the resistors are 0.913 cm in length. Use the provided table of resistivities to calculate the resistance of each resistor. material 1 0.00367 material 2 0.488 material 3 4.63 x 10^-5Digital thermometers often make use of thermistors, a type ofresistor with resistance that varies with temperature more thanstandard resistors. Find the temperature coefficient of resistivityfor a linear thermistor with resistances of 75.0 Ω at 0.00°Cand 275 Ω at 525°C.
- When initially at 20°C, the power being supplied to a 553 Ohm resistor in a circuit is 7.20 W. Over time, the temperature of the resistor increase to 166°C. If the temperature coefficient of resistivity of the material composing the resistor is 3.23 x 10-3 °C-1, what power is supplied to the resistor at its operating temperature?10.RTD and thermistor work according to the same principle in which the increase in temperature causes the resistance of the sensor to increase. o True o FalseAn iron wire with a diameter of 2 mm will be used to connect a voltagesource to a 100 kΩ resistor. Numbers for conductivity and resistivity can be found inthe textbook.(a) What is the current needed to flow through the resistor if the resistor is to produce1 mW of heat?(b) What is the voltage drop across the 100 kΩ resistor if it has the current you foundin (a)?(c) How long would your iron wire have to be to produce a 0.01 V drop along thelength of the wire, assuming the current you found in (a)?(d) How much power is lost through the iron wire (assume the length you find in (c))?
- Refer to the figure below and the discussion of lights dimming when a heavy appliance comes on. Refrigerator Low P R. TW Large IR drop in wires Bulb dims R, = wire resistance Low R draws large I, R ww Motor (a) Given the voltage source is 120 V, the wire resistance R, is 0.400 N, and the bulb is nominally 76.0 W, what power (in watts) will the bulb dissipate if a total of 28.5 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance. W (b) What power (in kilowatts) is consumed by the motor? kWThree resistors are made out of three different materials and have different (but uniform) cross sections. Resistor 1 has a circular cross section of radius 1.61 mm. Resistor 2 has a square cross section with a side length of 3.07 mm. The third resistor's cross section is a right triangle with two sides of length 2.59 mm. All of the resistors are 0.613 cm in length. Use the provided table of resistivities to calculate the resistance of each resistor. R₁ = R₂ = R3 = 6.95 Incorrect 443 0.086 Ω Ω Ω Material 1 Material 2 Material 3 2 0.00479 92.m 0.682 92-m 4.63 x 10-5 22-m 3Please state if each question is True or False; if False, please explain why
- In a Joule's Law experiment, the mechanical equivalent of heat is determined by using calorimetry methods to determine the amount of heat generated by an electric current passing through a resistor. What are the major sources of error? How could they be compensated for or eliminated?Given the tolerance on β for the thermistor, what is the absolute value of the accuracy of the reading in °C that you will get on the thermistor at 30°C? (Type in a three-decimal number) Given the tolerance on β = 3977 (+ or - 0.75% at 25°C for a 5000 ohm resister )A coil of 350 turns is wound uniformly on an annealed steel core with a mean circumference of 0.15 m and a cross sectional area of 1.5x104 m2. The resistance of the coil is 15 Q and the voltage developed across the coil is 12 V. The relative permeability of an annealed steel is 850 and the permeability of free space is given as 4TT x 10-7 H/m. Calculate the following: Permeability of the medium; (ii) Magnetizing force; (ii) Reluctance of the coil.