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- A two-dimensional conduction resistance and heat rate may be expressed as 1 Rt = and q = SAT₁-2 respectively. Sk No O yes(b) A Resistance Temperature Detector (RTD) with temperature coefficient value of 0.00392, if the resistance reached 100 2 when expose to temperature 0°C, compute the resistance as the sensor exposed to temperature 35°C.Ay
- An electronic device designed to operate at any temperature in the range from 10.0C to 55.0C contains pure carbon resistors. By what factor does their resistance increase over this range?1.4. The resistance of a doped germanium crystal obeys the equation log R' = 4.697 – 3.917 log T. (a) In a liquid helium cryostat, the resistance is measured to be 218 N. What is the temperature? (b) Make a log-log graph of R' against T from 200 to 30,000 N. Th nocictance of a nlatinum wire is found to be 11.000 at the ice point, 15.247 N atA copper bar of resistivity 10.37 CM/ft at 20 C is 10 ft long. The dimension of the copper bar is 3 inches by 0.5 inches. If the inferred absolute zero temperature of copper is -234.5 C, determine the resistance of the bar at 27 C in microohm. Assume that the dimension of the bar is not affected by the change in temperature.
- sq 4. Maximum surface resistance. Consider a square sheet of side L, thickness d, and electrical resistivity p. The resistance measured between opposite edges of the sheet is called the surface resistance: R = pL/ Ld = p/d, which is independent of the area of the sheet. (R is called the resistance per square and is expected in ohms per square, because p/d has the dimensions of ohms.) If we express p by p=m/ne²t, then Rq=m/ndet. Suppose now that the minimum value of the collision time is determined by scattering from surfaces of the sheet, so that Td/v, where v is the Fermi velocity. Thus the maximum surface resistivity is Rmvp/nd²e². Show for a monatomic metal sheet one atom thickness that sq Rħ/e² = 4.1k, where lkn is 10³ ohms. sqWhen a 200 ohm resistor, a 300 microfarad capacitor (uF) that's initially uncharged, and a 6-volt battery are wired in a series formation, what is the starting current, measured in milliamps (mA)?The brightness of a television tube can be evaluated by measuring the amount of current required to achieve a particular brightness level. A sample of 25 tubes results in x̅= 450.5 and s = 21.6. Find (in microamperes) a 99% confidence interval on the mean current required.
- Recall that the potential difference Vab is the work per charge done by the electric field. Thus, the work W needed to move a charge Q through a resistor of resistance R is W= QVab Also, recall that the power Pequals W/t and Q = It to find %3D P = Vabl. This power is the rate at which a resistor dissipates electrical energy (that is, converts it to thermal energy). P = Vabl also gives the rate at which a source of emf delivers energy to an external circuit when the current leaves terminal a and Vab is the terminal voltage of the source. Recall that the SI unit of power is the watt (W), where 1 W = 1 J/s. The units work out in P = е Vabl. because 1 V = 1 J/C d 1 C = 1 A·s. A light bulb is rated at 110 W, 220 V. What steady current flows through it for these values? O 0.5 A O 22.0 A are ZO... O 11.0 A О 330.0А Click Save and Submit to save and submit. Click Save All Answers to save all answers. crosoft Teams Save All Answers Save and SLOnly solve the q1Find the power delivered to the element in Example 1.5 at 1 = 5 ms if the current remains the same but the voltage is: (a) v = 2i V, (b) v = ( 10 + 5i dt ) V.