A piece of gold wire has a resistance of 10 0. What will be the resistance of manganin wire of one-tent the length and one-third the diameter, if the specific resistance of manganin is 5 times that of silver OHMS
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- A 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).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-cm10) 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?
- a silver wire has a resistance of 3.5 ohm. what will be the resistance of manganin wire having diameter, half of the silver wire and length one-fourth? The specific resistance of manganin wire is 25 times that of silverThe 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 oCNichrome 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.
- 1. 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 resistor has a resistance of 43.6 ohm at 20°C and 50.8 ohm at 60°C. Determine the temperature coefficient of resistance of aluminium at 0°C, its resistance at 0°C and at 40°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°
- 1. Nichrome ribbon resistor elements each has a resistance of 1 ohm. The element is made from sheet of nichrome alloy, 0.0025 cm thick. If the width of the ribbon is 0.3 cm, what length is required per element in cm? Assume specific resistance of nichrome alloy to be 109 micro ohm-cm.A silver wire has conductance of 0.25 Siemens. What will be the resistance of a copper wire having a diameter one third and length quarter of the silver wire? The specific conductivity of silver is 60 times that of copper.The resistance of wire increases from 40 – ohm at 20 0C to 50 – ohm at 70 0C. Find the temperature coefficient of resistance at 0 0C.