Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 17P
Discuss in your own words the frequency characteristics of the transformer. Use the applicable equivalent circuit and frequency characteristics appearing in this chapter.
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Students have asked these similar questions
Draw an equivalent circuit for a real transformer. Briefly discuss the reason that each element appears in the equivalent circuit.
Discuss the relationship between the
operating frequency and the transformer
size?
Through your engineering studies
1. A transformer transforms......
(a) frequency
(b) voltage
(c) current
(d) voltage and current.
2. Which of the following is not a basic element of a transformer ?..
(a) core
(b) primary winding
(c) secondary winding
(d) mutual flux.
3. In an ideal transformer,
(a) windings have no
(b) core has no losses
(c) core has infinite permeability
(d) all of the above.
sistance
4. The main purpose of using core in a transformer is to......…......
(a) decrease iron losses
(b) prevent eddy current loss
(c) eliminate magnetic hysteresis
(d) decrease reluctance of the common magnetic circuit
5. Transformer cores are laminated in order to..
(a) simplify its construction
(b) minimize eddy current loss
(c) reduce cost
(d) reduce hysteresis loss.
6. A transformer having 1000 primary turns is connected to a 250-V a.c.
supply. For a secondary voltage of 400 V, the number of secondary turns
should be........
(a) 1600
(b) 250
(c) 400
(d) 1250
Chapter 23 Solutions
Introductory Circuit Analysis (13th Edition)
Ch. 23 - For the air-core transformer in Fig. 23.57: Find...Ch. 23 - Repeat Problem 1 if k is changed to 1. Repeat...Ch. 23 - RepeatProblem1fork=0.3,NP=300turns,andNS=25turns.Ch. 23 - For the iron-core transformer (k = 1) in Fig....Ch. 23 - RepeatProblem4forNP=240andNS=30.Ch. 23 - Find the applied voltage of an iron-core...Ch. 23 - If the maximum flux passing through the core of...Ch. 23 - For the iron-core transformer in Fig. 23.59: Find...Ch. 23 - Find the input impedance for the iron-core...Ch. 23 - Find the voltage Vg, and the current Ip if the...
Ch. 23 - If VL=240V,ZL=20resistor,Ip=0.05AandNs=50 find the...Ch. 23 - If Np400,Ns=1200andVg=100V,findthemagnitudeofIp...Ch. 23 - For the circuit in Fig. 23.60, find the...Ch. 23 - For the transformer in Fig. 23.61, determine the...Ch. 23 - For the transformer in Fig. 23.61, if the...Ch. 23 - Prob. 16PCh. 23 - Discuss in your own words the frequency...Ch. 23 - Determine the total inductance of the series coils...Ch. 23 - Determine the total inductance of the series coils...Ch. 23 - Determine the total inductance of the series coils...Ch. 23 - Write the mesh equations for the network in Fig....Ch. 23 - Determine the input impedance to the air-core...Ch. 23 - An ideal transformer is rated...Ch. 23 - Determine the primary and secondary voltages and...Ch. 23 - For the center-tapped transformer in Fig. 23.42,...Ch. 23 - For the multiple-load transformer in Fig. 23.43,...Ch. 23 - Prob. 27PCh. 23 - Write the mesh equations for the network of Fig....Ch. 23 - Write the mesh equations for the network of Fig....Ch. 23 - A current transformer has a secondary with 250...Ch. 23 - Generate the schematic for the network in Fig....Ch. 23 - Prob. 32PCh. 23 - Using a transformer from the library find the load...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Consider an ideal transformer with N1=3000andN2=1000 turns. Let winding 1 be connected to a source whose voltage is e1(t)=100(1| t |)volts for 1t1ande1(t)=0 for | t |1 second. A2- farad capacitor is connected across winding 2. Sketch e1(t),e2(t),i1(t),andi2(t) versus time t.arrow_forwardAn ideal transformer with N1=1000andN2=250 is connected with an impedance Z22 across winding 2. If V1=10000VandI1=530 A, determine V2,I2,Z2, and the impedance Z2, which is the value of Z2 referred to the primary side of the transformer.arrow_forwardFor a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding? (a) Yes (b) Noarrow_forward
- An ideal transformer has no real or reactive power loss. (a) True (b) Falsearrow_forwardWhat is the purpose of a transformer? Draw the symbols for a transformer.arrow_forwardFor the transformer in Problem 3.10. The open-circuit test with 11.5 kV applied results in a power input of 65 kW and a current of 30 A. Compute the values for GcandBm in siemens referred to the high-voltage winding. Compute the efficiency of the transformer for a load of 10 MW at 0.8 p.f. lagging at rated voltage.arrow_forward
- The figure below shows an equivalent circuit of a real transformer. Explain what each elements represent in the circuit.arrow_forward2. The parameters of a certain transformer are to be found. Following the procedure as outlined in the introduction under the first order low frequency model section: The resistance of the primary winding of a certain transformer is found to be R1 = 388 Q, while the resistance of the secondary winding is R, = 0.9 Q. A 200 Hz, 5 volt peak-to-peak sinusoid, V1, is applied to the primary while the secondary is left open-circuited. The primary current, I,, entering at the dot is measured to be 1.07 milliamps peak-to-peak, lagging the voltage by nearly 83°. The open circuit voltage across the secondary, V20c, is measured to be 0.155 volts peak-to-peak. The sinusoid driving the primary is removed and a 200 Hz, 5 volt peak-to-peak sinusoid, V2, is applied to the secondary while the primary is left open-circuited. The secondary current, I2, entering at the dot is measured to be 206 milliamps peak-to-peak, lagging the voltage by 87°. From these measurements, estimate the self-inductances, L,…arrow_forwardElectrical Engineering... What is the function of potential transformer? Drawbacks ?arrow_forward
- 24. From the short circuit test and open circuit test in #19 and #20, the equivalent circuit of a transformer can be obtained (it is then referred to the low voltage end). The transformer is rated 50 kVA,60 Hz, 2300:230 V. If it is delivering power at rated load, 0.85 lagging pf, determine: a. Load current, In. b. Iм c. Ic d. What is the value of Vp? 0.0084633 N j0.0246696 n Vp 153.3333 0Elc IM j197.22340 50 kVA 23020° V Z 10 0.85 pf lagarrow_forwardIdeal transformer..arrow_forwardA typical single-phase transformer has a certain value of voltage regulation when connected to the load. If the voltage regulation is equal to zero, what is the behavior of the load connected to the transformer?arrow_forward
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