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For a copper wire in a 2560m long transmission line to have a resistance of 1.00...
Imagine a copper wire 10 km long
Imagine a copper wire 10 km long that needs to supply a city with 10 Mwatts of power--say from a waterfall. If the city ran on DC power, with voltages of 100 V, how much current would run through that wire? If you were willing to lose 1% of your power as heat in the wire, how thick would such a wire have to be? The resistivity of copper is 1.7 x 10-8 ohm-m.
Multiple Choices: 1pt _1. If the resistance of a copper wire is 1002 at 20°C, what...
Multiple Choices: 1pt _1. If the resistance of a copper wire is 1002 at 20°C, what is its resistance at 60°C? A. 11662 B. 12522 C. 13492 D. 14322 2. Three resistors of 2022, 60 2 and 100 are connected in parallel. The current through the 100 2 is 120mA. Determine the current through 2012 resistor, A. 1000mA B. 800mA 600mA D. 400mA 3. Three resistors of 6 ohm resistance are connected in delta. Determine the measured resistance of an...
A copper wire of resistance R = 22 Ohm. is connected to a source of voltage...
A copper wire of resistance R = 22 Ohm. is connected to a source of voltage that mcreases with time as DeltaV(t) = v_0(1 - e^-at), where V_0 = 130 V and a = 0.57 s^-1 Part (a) Enter an expression for the power dissipated in the wire in terms of V_0, a, R, and t. Expression : P = Select from the variables below to write your expression. Part (b) Calculate the energy dissipated by the resistor in joules...
Question 7 1 pts High voltages are used for long-distance electrical power transmission because more voltage...
Question 7 1 pts High voltages are used for long-distance electrical power transmission because more voltage means more power. high voltage prevents people from stealing the electricity. wires are better conductors at high voltages. the low currents allowed by high voltage means less power lost as heat in the wire. Water can be boiled by placing it in vacuum, because slow-moving molecules get pushed out of the liquid due to the pressure of the liquid. oxygen bubbles are pulled out...
22-9. An electrical power line using No. 4 copper wire has a resistance of 0.248 ohm...
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?
Q3/17 Some copper wire has a resistance of 200 Ohm at 20.C.A current is passed through...
Q3/17 Some copper wire has a resistance of 200 Ohm at 20.C.A current is passed through the wire and the temperature rises to 90°C. Determine the resistance of the wire at 90°C, assuming that the temperature coefficient of resistance * .is 0.004/-C at 0 C 201.666 Ohm O 352.778 Ohm O 232.232 Ohm O 220 Ohm O 251.85 Ohm O 521.65 Ohm O Q5/// The maximum power dissipated in a 4 load is 100 w when connected to a d.c....
Problem 5: A 5 cm long wire is in a uniform magnetic field of 4T, so...
Problem 5: A 5 cm long wire is in a uniform magnetic field of 4T, so that current in the wire is perpendicular to the magnetic field. The wire is connected to a 10 ohm resistor in series, so that the resistance of the wire is negligible. The wire and resister are then connected in series to a charged 1500mF capacitor at 50 kV. A: What is the current through the wire as function of time, with t-0 being when...
Suppose you have a DC power supply connected in series with two identical resistors by low-resistance...
Suppose you have a DC power supply connected in series with two identical resistors by low-resistance connecting wires. You set the power supply to a potential difference of 6.0 V. Which of the following statements, if any, hold true? The same potential difference will appear across each resistor. The same amount of current will flow through each resistor. The same amount of current will flow through the power supply as flows through each resistor. The potential difference across each resistor...
You have two wires connected end-to-end (in series). Wire 1 is copper and wire 2 is...
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...
In communications. 6 Both conductors of a two-wire transmission line are steel wires (1cm diameter, ơsteel-5x10 U/m, μ = 10 H/m) , with a 1-mm thick copper coating. If the wires have a center-to-c...
In communications.
6 Both conductors of a two-wire transmission line are steel wires (1cm diameter, ơsteel-5x10 U/m, μ = 10 H/m) , with a 1-mm thick copper coating. If the wires have a center-to-center separation of 5cm in air, find C, L, G and R at ω = 10 rad/s
6 Both conductors of a two-wire transmission line are steel wires (1cm diameter, ơsteel-5x10 U/m, μ = 10 H/m) , with a 1-mm thick copper coating. If the wires have...
Multiple Choices: 1pt _1. If the resistance of a copper wire is 1002 at 20°C, what is its resistance at 60°C? A. 11662 B. 12522 C. 13492 D. 14322 2. Three resistors of 2022, 60 2 and 100 are connected in parallel. The current through the 100 2 is 120mA. Determine the current through 2012 resistor, A. 1000mA B. 800mA 600mA D. 400mA 3. Three resistors of 6 ohm resistance are connected in delta. Determine the measured resistance of an...
A copper wire of resistance R = 22 Ohm. is connected to a source of voltage that mcreases with time as DeltaV(t) = v_0(1 - e^-at), where V_0 = 130 V and a = 0.57 s^-1 Part (a) Enter an expression for the power dissipated in the wire in terms of V_0, a, R, and t. Expression : P = Select from the variables below to write your expression. Part (b) Calculate the energy dissipated by the resistor in joules...
Question 7 1 pts High voltages are used for long-distance electrical power transmission because more voltage means more power. high voltage prevents people from stealing the electricity. wires are better conductors at high voltages. the low currents allowed by high voltage means less power lost as heat in the wire. Water can be boiled by placing it in vacuum, because slow-moving molecules get pushed out of the liquid due to the pressure of the liquid. oxygen bubbles are pulled out...
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?
Q3/17 Some copper wire has a resistance of 200 Ohm at 20.C.A current is passed through the wire and the temperature rises to 90°C. Determine the resistance of the wire at 90°C, assuming that the temperature coefficient of resistance * .is 0.004/-C at 0 C 201.666 Ohm O 352.778 Ohm O 232.232 Ohm O 220 Ohm O 251.85 Ohm O 521.65 Ohm O Q5/// The maximum power dissipated in a 4 load is 100 w when connected to a d.c....
Problem 5: A 5 cm long wire is in a uniform magnetic field of 4T, so that current in the wire is perpendicular to the magnetic field. The wire is connected to a 10 ohm resistor in series, so that the resistance of the wire is negligible. The wire and resister are then connected in series to a charged 1500mF capacitor at 50 kV. A: What is the current through the wire as function of time, with t-0 being when...
In communications.
6 Both conductors of a two-wire transmission line are steel wires (1cm diameter, ơsteel-5x10 U/m, μ = 10 H/m) , with a 1-mm thick copper coating. If the wires have a center-to-center separation of 5cm in air, find C, L, G and R at ω = 10 rad/s
6 Both conductors of a two-wire transmission line are steel wires (1cm diameter, ơsteel-5x10 U/m, μ = 10 H/m) , with a 1-mm thick copper coating. If the wires have...
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