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In each diagram is the current leading, lagging or in-phase with the voltage? Current Voltage Choose......
Why is the output phase voltage not equal to the internal generated voltage when there is...
Why is the output phase voltage not equal to the internal generated voltage when there is an armature current flowing through the armature? Also why does an alternator’s voltage drop when it is loaded down with a lagging load and rises when loaded with a leading load. Explain in paragraph form.
In the following diagram, label the following: leading and lagging strand
In the following diagram, label the following: leading and lagging strand, Okazaki fragment, DNA polymerase, DNA ligase, helicase, RNA primase, singlestrand binding proteins, RNA primer, replication fork, topoisomerase and the 5' and 3' ends of strands.
A three-phase load of 15 kVA with a PF of 0.8 lagging is connected in parallel...
A three-phase load of 15 kVA with a PF of 0.8 lagging is connected in parallel with a three-phase load of 36 kW at 0.6 PF leading. The line-line voltage is 2000V. a) Find the total complex power and power factor. Is it inductive or capacitive? b) How much kVAR is needed to make the PF unity? c) What is the magnitude of the current going into the total load?
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator operating at 7MW and a 0.88 lagging power factor is connected to the Grid. The synchronous reactance is 1.5Ω (i) Calculate the phase current,...
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator operating at 7MW and a 0.88 lagging power factor is connected to the Grid. The synchronous reactance is 1.5Ω (i) Calculate the phase current, excitation voltage and load angle. [10] (ii) What is the maximum theoretical power at this excitation? Draw a phasor diagram (to scale) and from this estimate the phase current and power factor when operating at this point. 151
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator...
1) Draw a diagram of a bacterial replication fork showing the leading and lagging strand of...
1) Draw a diagram of a bacterial replication fork showing the leading and lagging strand of new DNA and the enzymes responsible for the processes involved. Indicate the 3' and 5' end of each nucleic acid strand. 2) The ends of a linear chromosome cannot be replicated by the normal DNA replication enzymes. Why? How does the eukaryotic cell solve this problem?
5. Consider the one-ine diagram shown below. The three-phase transformer bank is made up of three identical single-phase transformer, each specified by X1-0.004 Ω (on the high-voltage side), negl...
5. Consider the one-ine diagram shown below. The three-phase transformer bank is made up of three identical single-phase transformer, each specified by X1-0.004 Ω (on the high-voltage side), negligible resistance and magnetizing current, and turns ratio N2/N,-10. The transformer bank is delivering is delivering 110MW at 0.9 power factor leading to a substation bus voltage is 230kV. Determine the reactive power supplied by the source. (3.47) whose To rest of the system Generator ΔΥ 230-kV substation bus Step-up transformer bank...
Draw a diagram showing a portion of a chromosome undergoing replication. Label the leading and lagging...
Draw a diagram showing a portion of a chromosome undergoing replication. Label the leading and lagging strands, and replication fork. What are the roles of DNA polymerase and RNA polymerase? How does this process represent semi-conservative replication?
4. (25 points) Find the voltage and current for each resistor in the following diagram. 80...
4. (25 points) Find the voltage and current for each resistor in the following diagram. 80 50 300 30 V 15 600 Resistor Current Voltage Upload Choose a File
In a synchronous generator, at 0.8 lagging power factor, an excitation voltage per phase of 240...
In a synchronous generator, at 0.8 lagging power factor, an excitation voltage per phase of 240 V gives a rated terminal voltage V. If the power factor of load increases to unity, the excitation voltage per phase required to produce a terminal voltage of V must be a. 260 V b. 250 V c. 240 V d. 225 V
Problem 7 Three three-phase wye-connected loads are in parallel across a three-phase supply. The first load draws a cur...
Problem 7 Three three-phase wye-connected loads are in parallel across a three-phase supply. The first load draws a current of 10 A at pf- 0.93 (leading), and the second and third loads (each) draw a current of 20 A at pf= 0.85 (lagging). Suppose the line-to-line voltage is 240 V. Compute the following: a) The transmission line current b) The load power factor c) The complex power supplied by the source
Problem 7 Three three-phase wye-connected loads are in parallel...
In the following diagram, label the following: leading and lagging strand, Okazaki fragment, DNA polymerase, DNA ligase, helicase, RNA primase, singlestrand binding proteins, RNA primer, replication fork, topoisomerase and the 5' and 3' ends of strands.
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator operating at 7MW and a 0.88 lagging power factor is connected to the Grid. The synchronous reactance is 1.5Ω (i) Calculate the phase current, excitation voltage and load angle. [10] (ii) What is the maximum theoretical power at this excitation? Draw a phasor diagram (to scale) and from this estimate the phase current and power factor when operating at this point. 151
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator...
5. Consider the one-ine diagram shown below. The three-phase transformer bank is made up of three identical single-phase transformer, each specified by X1-0.004 Ω (on the high-voltage side), negligible resistance and magnetizing current, and turns ratio N2/N,-10. The transformer bank is delivering is delivering 110MW at 0.9 power factor leading to a substation bus voltage is 230kV. Determine the reactive power supplied by the source. (3.47) whose To rest of the system Generator ΔΥ 230-kV substation bus Step-up transformer bank...
4. (25 points) Find the voltage and current for each resistor in the following diagram. 80 50 300 30 V 15 600 Resistor Current Voltage Upload Choose a File
In a synchronous generator, at 0.8 lagging power factor, an excitation voltage per phase of 240 V gives a rated terminal voltage V. If the power factor of load increases to unity, the excitation voltage per phase required to produce a terminal voltage of V must be a. 260 V b. 250 V c. 240 V d. 225 V
Problem 7 Three three-phase wye-connected loads are in parallel across a three-phase supply. The first load draws a current of 10 A at pf- 0.93 (leading), and the second and third loads (each) draw a current of 20 A at pf= 0.85 (lagging). Suppose the line-to-line voltage is 240 V. Compute the following: a) The transmission line current b) The load power factor c) The complex power supplied by the source
Problem 7 Three three-phase wye-connected loads are in parallel...
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