1. The density of copper is 9 grams per cu. cm, and the resistivity is 1.724 µ-cm. Determine the resistance of a 20 kg of copper where the cross section of which is 8.0 sq. mm. (Solution) 0.5986 N O 0.6986 O O 0.8090 2 0.7086 Q
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- İNGİLİZCE TÜRKÇE RUSÇA In a semiconductor crystal, atoms are held together as follows: Please choose one: a. gravitational forces b. covalent bonds C. interaction of valence electrons D. answers A., B. and C. 92/5000 13:30 30.04.2021A two wires, one of Copper and the other of Nickel, if the resistance of the first is (12.7 Q), and the second is (11.6 0) at room temperature, at what temperature are their resistances equal? Note that the temperature coefficient of resistivity of Copper is (0.0039 C-1), and for Nickel it is equal to (0.006 C1).10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm? 11) The resistance of a copper at 30°C is 500. If the temperature coefficient of copper at 0°C is 0.00427. What is the resistance at 100°C?
- Determine the thermal coefficient of resistance of copper at 50°C, then use this value todetermine the resistance of copper wire at 170° if the resistance of this copper wire at 50°C is50ohms. The thermal coefficient of resistance of copper at O°C is 0.004264/C°nichrome ribbon resistor elements each has a resistance of 1 ohm. the element is made from sheet of nichrome alloy, 0.025 cm thick. if the width 9f the ribbon is 0.3 cm , what is the length is required per element? assume specific resistance of nichrome alloy to be 10g micro ohm-cmThe resistance of a copper at 30°C is 500. If the temperature coefficient of copper at 0°C is 0.00427. What is the resistance at 100°C?
- Nichrome ribbon resistor elements each has a resistance of 1 ohm. The element is made from sheet of nichrome alloy, 0.025 cm think. If the width of the ribbon is 0.3cm, what length is required per element in cm? Assume specific resistance of nichrome alloy to be 109microOhm-cm.Please calculate the percentage of effects of electrons to conductivity of Silicon, which is 6 (ohm.m)^-1 and the mobilities are ue = 0,19m²/V.sn and up = 0,0425 m²/V.sn1. Given a typical tungsten filament of a light bulb, 1 m long and 0.05mm in radius. nim B. Given that the temperature resistivity coefficient of tungsten is 4.5 X 10-3/ °C, meldoig zinovovd omo A. Calculate the typical resistance of the filament given that its resistivity at 20 °C is 5.6 X 10-8 (Q -m). calculate the resistance at 2000 °C. assuming linear resistivity-temperature 2000 ert pria relation.
- A sample of wire (1 mm in diameter by 1 m in diameter) length) of an aluminum alloy (containing 1.2% Mn) is placed in an electrical circuit, as shown in the figure next to. A voltage drop of 432 mV is measured at wire length when it carries a 10 A current. Calculate the conductivity of this alloy.The specific resistance of platinum at 0o c is 10.3 .cm . how long must a wire of platinum be to have a resistance of 4 at 0o c , if the diameter ( d ) = 0.0274 cm . What will be the resistance of the wire at 100o c if the temperature coefficient ( ∝ ) of platinum is 0.0038 per oC2 Curront is definad as the rate of charge flow. It a charge offo.0065 Golombs passes a given point in a conductor in loo millisesands, Calcutate the? a) current in amperes (Hint: I=) b) Current in milli ampares- a.given Ans: a)o.065 A b) 65 mA