Consider the resistor network shown in the figure, with R₁ = 250 [2], R₂ = 1.0 [kN], R3 = 1.2 [kn], R4 = 1.0 [kn], and R5 = 1.5 [k]. The source voltage & is 24 [V], and has no internal resistance. What is the current passing through R₁? E R₁ www R₂ R3 OA. 34 [mA] OB. 54 [mA] c. 96 [mA] D. 104 [mA] www-ww R4 R5
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- Unreasonable Results (a) What current is needed to transmit 1.00 102 MW of power at 10.0kV? (b) Find the resistance of 1.00 km of wire that would cause a 0.0100% power loss. (c) What is the diameter of a 1.00-km-long copper wire having this resistance? (d) What is unreasonable about these results? (e) Which assumptions are unreasonable, or which premises are inconsistent?Three equally long meter-long copper wires with diameters of 1 mm, 2 mm and 3 mm are connected in series and connected to a voltage of 12 V. How much current flows through the wires (I)? What are the stresses on the individual sections (U1, U2, U3)? (specific resistance of copper is 0.017 Vmm2/ Am)The current in a certain wire at 20.0°C is 2.40 A when thepotential difference between the ends of the wire is 1.50 V. Ifthe wire is heated to 80.0°C and the potential differenceremains the same, the current decreases to 2.00 A. (a) What isthe resistance of the wire at 20.0°C? At 80.0°C? (b) What is thetemperature coefficient of resistivity for the material of whichthis wire is made?
- a) A1500W heater is connected to a 120V line. How many heat energy does it produce in 2.0hours? b) The resistivity of gold is 2.44x10-8ohm.m at room temperature. A gold wire that is 1.8mm in diameter and 11cm long carries a current of 170mA. How much power is dissipated in the wire?A coil of fine copper wire has a resistance of 6.4-Ω and a total mass is 15.1 g. What is the diameter d of the wire and what is its length L? (The density of copper is 8.96 g/cm3.) D= IN MM ?? L= IN M ??In the figure R1 = 5.11 Ω, R2 = 15.3 Ω, and the ideal battery has emf ε = 12.4 V. (a) What is the magnitude of current i1? (b) How much energy is dissipated by all four resistors in 0.518 min?
- What is the current in a wire in which 3.62x1020 electrons pass a single point every 8.79 seconds? Report your answer with three significant digits. (e = 1.602x10-19 C)A high voltage transmission line of diameter 3.73 cm and length 3.76189 km carries a steady current of 1.9 x103 A. If the conductor is copper with a free charge density of 6 x 1028 electrons/m3, how long (in seconds ) does it take one electron to travel the full length of the cable? (e = 1.6 x 10−19 C).For this problem use scientific/exponential notation to represent your answer. Eg., -0.0001 can be written as 1.0e-4 or as 1.0E-4. Spaces are not allowed.The current through a 10Ω resistor is 0.025A. What is the voltage drop across the resistor? a. 2.5mV b. 0.25V c. 2.5V d. 0.25mV
- 2) What is the drift speed of electrons in the 12-gauge wire of a certain conductor in a typical building of the UET physics lab having cross- sectional area of 3.31 um^2 and carries a uniform current of 10000.0 mA? Suppose each atom of the conductor contributes one free electron to the current, whereas the molar mass and density of the conductor is 63.5 g/mol and 8.92 g/cm^3.* Ob) 3 mf O c) 2.3 PF od) 2.1 m e) 2 UF f) 2 mF O F g) 1 m F O HINEA gold wire carries 22 A of current with a drift velocity of 4.3 × 10-3 m/s. Assume there is one free electron per gold atom, and the density of gold is 1.93 × 104 kg/m3. The molecular weight of gold is 196.97 g/mol. Part (a) What is the diameter of this gold wire? d = m Part (b) For the problem above, calculate the resistance of the wire under those conditions. Assume the wire is 3.7 m in length, and the resistivity of gold is 2.44 × 10-8 Ω⋅m. R = Ω Part (c) How much power is dissipated by this wire? P= W Part (d) If the wire is heated by an additional 188 K (compared to part (a)), what is the new resistance at this increased temperature? The temperature coefficient of resistivity for gold is 3.4 × 10-3 °C-1 R = Ω Part (e) Under the conditions in part (d), what is the value of the potential for the wire? V =…At room temperature, what is the strength of the electric field in a 12 gauge copper wire (diameter 2.05 mm) that is needed to cause a 3.90 A current to flow? Use the resistivity at room temperature for copper ρ = 1.72×10−8 Ω⋅m. Express your answer with the appropriate units. What field would be needed if the wire were made of silver instead? Use the resistivity at room temperature for silver ρ = 1.47×10−8 Ω⋅m. Express your answer with the appropriate units.