A copper transmission cable (p = 1.72 × 10¬8 Nm) 250 km long and 20 cm in diameter, caries a current of 100A. What is the potential drop across the cable? (V)
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- Consider a three-core, three-phase, 50 Hz, 11 kV cable whose conductors are denoted as R, Y and B in the figure. The inter-phase capacitance (C₁) between each pair of conductors is 0.2 µF and the capacitance between each line conductor and the sheath is 0.4 µF. The per-phase charging current is C₂ HE C₁ ,C₁ Outer SheathIf the cross sectional area of a conductor is doubled, then the resistance of the conductor remains the same. becomes half of the initial value. becomes double the initial value. becomes four times the initial value.50 Hz, 11 kV Consider a three-core, three-phase, cable whose conductors are denoted as R, Y and B in the figure. The inter-phase capacitance (C₁) between each pair of conductors is 0.2 µF and the capacitance between each line conductor and the sheath is 0.4 μF. The per-phase charging current is C₁ (B) C₂ C₂: (R HH C₁₂ C₁ C₂ Outer sheath
- 2. Draw, in the spaces provided, rough sketches shov ing the following: a) A current which lags the voltage by 60°. b) A current which lead the voltage by 60°. c) A current which lags the voltage by 180°.determine the currents i1, i2, and i3 using Gauss-Jordan Elimination What is the voltage across the 3 ohm resistance? What is the power across the 3 ohm resistance?Amagnetic field is being generated by a current of 2.0A flowing through 180 turns of wire on a core having a reluctance of 210000.0 At/Wb. Determine the flux of the circuit in mWb.
- Table A.3 lists a 4/0 copper conductor with 12 strands and having a diameter of 0.3373 cm.a) Find the resistivity and dc resistance at 50 degree Celcius by assuming a 2% increase due to spiralling.b) From Table A.3, determine the percent increase in resistance at 60 Hz versus dc.As the voltage across conductors is increased, the gradient around the surface of conductor ... .. O becomes zero O remains same O decreases O increasesQ2: A 33 kV,3-phase underground feeder, 3.4 km long, uses three single core cable. Each cable has a conductor diameter of 2.5 cm and the radial thickness of insulation is 0.6 cm. The relative permittivity of dielectric is 3.1. Find (a) capacitance of the cable per phase (b) charging current per phase.
- Problem#6 A 2-wire DC distributor AB is fed at both ends at the same voltage of 230 V. The length of the distributor is 500 metres and the loads are tapped off from the end A as shown below. If the maximum voltage drop of 5-5 V is to be allowed, find the X-sectional area of each conductor and point of minimum potential. Specific resistance of conductor material may be taken as 1-73 x 10-8 S2 m. 60 A 40 A 150 m 250 m Load: Distance: 100 A 50 m 100 A 400 mQ2: Two circuits are arrange as shown in figure Below, (a and b) each one of them has two identical conductors, the vertical distance between each conductor in the same circuit is 1 m, the distance horizontally between circuits is 30 cm, take 1 cm as diameter for each conductors. Determine the inductance per km of the double circuit? a -- 3D 91A cylindrical copper wire has a diameter 4 mm and length 10 cm with a conductivity 5x107 S/m. If an electric field of 2 mV/m is applied between end points what is the current in the wire? Lütfen birini seçin: a. 2.50 A b. 1.25 A c. 4.34 A d. 5.50 A e. 3.32 A