Copper wires used to transport electrical current heat up because of the resistance in the wire. If a 188-g wire gains 448 J of heat, what is the change in temperature of the wire? Copper has a specific heat of 0.384 Jg-1c-1.
Copper wires used to transport electrical current heat up because of the resistance in the wire....
Copper wires used to transport electrical current heat up because of the resistance in the wire. If a 180.-g wire gains 432 J of heat, what is the change in temperature of the wire? Copper has a specific heat of 0.384 Jg-1 0-1 Change in temperature
For a technical application, an electrical engineer needs to create a solenoid using copper wire with diameter d 0.500 mm. The resistance of the solenoid needs to be 3.500 and the magnetic field of the solenoid with a current of 2.50 A should be 6.50 x 10-T. Assume the resistance does not change significantly with temperature, and the radius of the solenoid is 1.00 cm. (Use p - 1.70 x 10-40-m for the resistivity of copper.) (a) How many turns...
A) An engineer is designing a product in which a copper wire will carry large amounts of electricity. The resistive heating of a 66 g copper wire is expected to add 520 J of heat energy during a 10-minute operating cycle. What is the temperature increase of the wire? You may use the following information about copper to answer the question: specific heat = 0.385 J g-1 °C-1 density = 8.94 g/cm3 coefficient thermal expansion = 6.5 µm m-1 K-1...
A given copper wire has a resistance of 5.05 Ω at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.69 Ω at 20.0°C. At what temperature will the two wires have the same resistance? Your response differs from the correct answer by more than 10%. Double check your calculations.°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...
22-9. An electrical power line using No. 4 copper wire has a resistance of 0.248 ohm per 1000 ft and carries a current of 30 amp. If the potential at a point on the line is 250 volts, what is 'the potential at a point 5 miles farther along the line in the direction of the current?
2-157 A long electrical resistance wire of radius r.-0.25 cm has a thermal conductivity kwire-15 W/m-K. Heat is generated uniformly in the wire as a result of resistance heating at a constant rate of 0.5 W/cm3. The wire is covered with polyethylene insulation with a thickness of 0.25 cm and thermal conductivity of ks 0.4 W/m K. The outer surface of the insulation is subjected to free convection in air at 20°C and a convection heat transfer coefficient of 2...
Now let's consider the resistance of speaker wire. Suppose you're hooking up a pair of stereo speakers, You happen to have on hand some 20-m-Jong pieces of 16 gauge copper wire (diameter 1.3 mm); you use them to connect the speakers to the amplifier. These wires are longer than needed, but you just coil up the excess length instead of cutting them. What is the resistance of one of these wires? To improve the performance of the system, you purchase...
1. A number 12 copper wire has a diameter of 2.053 mm. Calculate the resistance of a 37.0 m long piece of such wire. (Use 1.72×10-8 Ωm for the resistivity of copper.) Use the formula for resistance remembering that the diameter is specified rather than the radius. 2. For safety, the National Electrical Code limits the allowable amount of current which such a wire may carry. When used in indoor wiring, the limit is 20.0 A for rubber insulated wire...
A copper wire makes up a 139 turns, 5.60 cm diameter coil. The resistance of the coil is 3.40 Ω. There is a magnetic field parallel to the axis of the coil. If the induced current in the coil is 2.20 A, what is the rate of change of the magnetic field?