To what value would you have to raise the temperature of a copper wire (originally at 20 ∘C) to increase its resistance by 17 % ?
To what value would you have to raise the temperature of a copper wire (originally at...
(a) To what temperature (in °C) must you raise a copper wire, originally at 20.0°C, to triple its resistance, neglecting any changes in dimensions? oC (b) Does this happen in household wiring under ordinary circumstances? O Yes O No
What final temperature of a platinum wire (originally at 20.0 0C) is required to increase its resistance from 80.0 Ω to 104 Ω?
At what temperature will aluminum have a resistivity that is three times the resistivity of copper at room temperature? (Assume room temperature is 20 degree C.) (b) At this temperature, an aluminum wire and a copper wire of equal length are found to have the same resistance. What is the ratio of their radii? A physics student has a single-occupancy dorm room. The student has a small refrigerator that
You have a 5 meter length of copper wire. The diameter of the wire is 0.5 mm Copper has a resistivity of p = 1.70*10^-18 ohms at room temperature. A) What is the resistance of the wire? B)Suppose you connect the wire to a battery, and shape the circuit to one circular loop. Sketch what the magnetic field looks like in this scenario. Include direction of current. C) What is the magnetic field at the center of the loop. The...
1. What is the resistance at normal room temperature of 60 m of copper wire having a diameter of 0.64 mm? (r copper = 1.7241 X 10^-8 at 20 C) 2. A semi-circular copper conductor has an inner radius of 60 cm, an axial thickness of 4 cm and a radial thickness of 3 cm. Determine the resistance of this conductor between its two end contact faces at 70 C
You have two wires connected end-to-end (in series). Wire 1 is copper and wire 2 is made from a “special” carbon conductor. Wire 1 has a resistance of 0.215 Ω/ft. and is 500 ft. long. Wire 2 has a resistance of 0.141 Ω/ft. and is 700 ft. long. Both of these resistances are measured at 20°C. If the ambient temperature is 99°F, what is the wire’s total series resistance? (FROM AN OLD F.E. EXAM) A reminder that temperatures must be...
A particular application requires a 10 m length of aluminum wire to have a resistance 0.40 mΩ at 20∘C. If the resistance of the wire cannot vary by more than ± 7.5 % from its value at 20 ∘C, to what operating temperature range should it be restricted? What would be the operating range if the wire were, instead, made of copper?
Now let’s see how temperature affects the resistance of copper wire. A length of 18 gauge copper wire with a diameter of 1.02 mm and a cross-sectional area of 8.20×10−7 m2 has a resistance of 1.02 Ω at a temperature of 20 ∘C. Find the resistance at 0 ∘C and at 100 ∘C. The temperature coefficient of resistivity of copper is 0.0039 (C∘)−1. On a hot summer day in Death Valley, the resistance is 1.15 Ω. What is the temperature?
In order to double its resistance, by how much would you have to increase the temperature of a piece of the following? (a) copper (The temperature coefficient of resistance for copper is 3.9 x 10-3 (oc)-1.) oC (b) Nichrome (The temperature coefficient of resistance for Nichrome is 4.0 x 10-4 (°c)-1.) OC
7. A copper wire has a resistance of 4.75 at room temperature. What is the wire’s resistance at 86.4 °C?