6 Commercial resistors can be produced by evaporating a controlled amount of carbon onto a ceramic support structure. The carbon is often patterned into a curvy line to fit more length -D onto the surface. What thickness of carbon (in μm) should be deposited to produce a resistor of 3.50 k if the length of the line is 2.50 cm and the width is 67.6 μm? Type your answer....
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- 4. An alloy has an elastic modulus of 115 GPa. For the alloy, plastic deformation begins at a stress of 275 MPa. (a) If a sample of cross-sectional area 325 mm? is obtained from the alloy, determine the maximum load that may be applied on the sample without plastic deformation. (b) The original sample length is specified as 115 mm, what is the maximum length to which the sample can be stretched without plastic deformation.2. Make a graph of the following data points. Is the relationship linear? If so, find the slope and y-intercept. Are the variables directly proportional? voltage (V) 1.0 1.5 2.0 mono 2.5 3.0 3.5 4.0 current (A) 3.45 x 10-³ 5.02 x 10-3 6.88 x 10-3 8.60 x 10-3 1.01 x 10-2 1.22 x 10-2 1.36 x 10-2 Linear? Slope Y-Intercept Directly proportional?Resistivity measurements at 300 K show that an annealed metal single crystal has amonovacancy concentration CV = 10-9. When the same crystal is quenched from a hightemperature, the measurements indicate CV = 2x10-3. Calculate the temperature of thequench [Take Hf = 51.4 kJ/mol and R = 8.314 J/mol.K]. State any assumption involved. (5)(b) Explain why the esistivity of a metal is expected to be found more at room temperature after quenching. Hint: Use Matthiessen’s rule (find out by self-studying and cite thesource.)
- A thin film of zinc is to be deposited on one side of a steel sheet. Determine the zinc film thickness per 1cm2 of steel sheet if 2 A current was used and the electrolytic deposition process was done for exactly 30 minutes at 25oC. The zinc solution has a concentration of 1 M and can be assumed to be constant throughout the process. pls explain the solution shown in the figure thoroughly or you can come up with your own thank you2. Make a graph of the following data points. Is the relationship linear? If so, find the slope and y-intercept. Are the variables directly proportional?voltage (V) 1.01.52.02.53.03.54.0 current (A)3.45 x 10-35.02 x 10-36.88 x 10-38.60 x 10-31.01 x 10-21.22 x 10-21.36 x 10-2 Linear?_______________Slope_________________Y-Intercept____________Directly proportional?____(d) Calculate the electrical conductivity of a 6.0 mm diameter cylindrical silicon specimen of 60 mm long in which a current of 0.5 A passes in an axial direction. A voltage of 12.5 V is measured across two probes that are separated by 40 mm. i. Compute the electrical conductivity of the specimen. C12334 ii. Compute the resistance over the entire 60 mm of the specimen using the data in (1).
- (a) Solid Agl and ß-alumina (NaAl11017) are both good conductors at elevated temperatures. Pure Zro2 is an insulator but a solid solution ZrO2 (10% CaO) is a good conductor at high temperature.Why are metallized films a cheaper alternative to foil?5. Calculate the conductance and the conductivity of a metal if the resistivity of the metal is 2.824 x 108 Q.m, with resistance of 9.0 x 10 Q when current is 1.25 A.
- 1. Railroad tracks made of 1025 steel are to be laid during the time of year when the temperature averages 10°C (50°F). If a joint space of 4.6 mm (0.180 in.) is allowed between the standard 11.9-m- (39-ft-) long rails, (a) what is the hottest possible temperature that can be tolerated without the introduction of thermal stresses? (b) If these tracks were going to be laid in the Australian Outback and see temperatures of 150 °F, what would the stress be?At 25 °C, 0.05 M of MgCl2 electrolyte solution showed molar conductivity of 194.2 S cm? mol-. A cell with electrodes that 1.50 cm² in surface area and 0.50 cm apart is filled with the above electrolyte. Determine the resistance of the solution.A Knudsen cell was used to determine the vapor pressure of Ge at 1000^(@)C. During an interval of 7200s, the mass loss through a hole of radius 0.50mm was 43ug. What is the vapor pressure of Ge ? (assume Ge gas to be monoatomic) Please answer fast i give you upvote.