Concept explainers
a.
Calculate the value of capacitance
b.
Calculate the value of capacitance and the roots of the characteristic equation when the capacitance is adjusted to give a neper frequency of
c.
Calculate the value of capacitance and the roots of the characteristic equation when the capacitance is adjusted to give a resonant frequency of
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- 3. The per unit values of positive, negative and zero sequence reactances of a network at fault are 0.08, 0.07 and 0.05 respectively. Determine the fault current if fault is line-to-line-to-ground. [j 16 p.u.]arrow_forwardFor the network shown in Figure B2, the switch is closed on to position I when t = 0 and then moved to position 2 when t = 100 ms. 1V 50 R₁ R₂ 200 10 mH Figure B2 a) i. What is the value of the time constant when charging (position I)? ii. Determine the current equation when charging (position I) [I mark] [2 marks] b) Determine the value of the charging current at 1.5 ms. [3 marks] i. What is the value of the time constant when discharging? [2 marks] ii. Determine current equation when discharging (remember switch is moved to position 2 when t = 100 ms) [3 marks] c) Determine the current in the inductor when t = 102.5 ms (remember switch is moved to position 2 when t = 100 ms) [4 marks]arrow_forwardNEED HANDWRITTEN SOLUTION PLEASE DO NOT USE AIarrow_forward
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- 4) For the sinusoidal signal m(t) = 2 sin(1000πt + 0.0557), shown down, is sampled, quantized and then encoded using the PCM technique. If a uniform quantizer, with 8 levels and a dynamic range [-2, 2], is used (a) Calculate the first 4 quantized samples and the ciated quantization errors. (b) Calculate the maximum quantization error (c) Calculate the signal-to-quantization- noise ratio. (d) Calculate the resultant bit rate. italicio (e) If it is required to increase the signal-to-quantization-noise ratio by 6 dB, how many quantization levels should be used in this case? What is the ratio between the new bit rate and the previous bit rate? msecarrow_forwardThe current of a 90.0 mH inductor changes with time in the form I=1.00t2 - 6.00t (in SI units). Determine the magnitude of the induced fem at a) t=1.00 s b) At what time will the fem equal zero?arrow_forwardA coil of 200 turns and 4 cm2 of section, is rotating in a magnetic field of 0.5 T. a) What must be its angular frequency to generate a maximum fem (εm) of 10 V?b) What is the value of εm if it rotates at 60 rev/s?arrow_forward
- An aluminum wire of constant circular cross section with a diameter of 4.00 mm is subjected to a uniform electric field of 0.2 V/m. Determine: (a) The current through the conductor if its conductivity is 3.64x107 Ω-1.m-1. b) The number of free electrons per unit volume if one conduction electron per aluminum atom is assumed. (The density is 2.7 g/cm3 and the molar mass is 27 g/mol). c) The drift velocity.arrow_forwardQ1) Your Company has a large data store that needs to back up to a new site every week. The volume of the data to backup every week is 10 TB. You have two choices: Choice #1: Use your high-speed Internet connection and transfer all the data over the Internet; Your Internet connection is 100 Mbps. Choice #2: Copy your data to a number of portable hard disks, drive them over in your van, then read data from the hard disks at the new site. The read/write speed of your portable hard disks is 500 Mbps. Each disk can hold 1 TB. You can only copy to or read data from one disk at a time. You need to drive 1 hour to the new site. a) Compute the data rate for the two choices. b) Which choice is faster?arrow_forwardframe size frame containing the seven bits 1100010 is received. The last 3 bits are the CRC generated using the generator polynomial G(x) = x+x+1. Does this frame contain an error? Show your calculations. data stream. Harrow_forward
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