Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Chapter 13, Problem 42E
(a)
To determine
Draw an equivalent circuit for the given transformer circuit without changing the parameters
(b)
To determine
Draw an equivalent circuit for the given transformer circuit without changing the parameters
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13. A transformer has a turns ratio of 5. If a 100-S resistor is
connected across the secondary, what is its resistance referred to
the primary?
A. 500 2
C. 1000 N
D.2500 2
B. 20 2
Q2. Correct the wrong
sentence if you find it in
only (all) of the following
sentences:
8) The primary mmf is not equal and same direction to the secondary mmf in an ideal
transformer.
9) The open circuit test is conducted at the rated current and the short-circuit test performed at
the rated voltage.
10) The short-circuit test is performed on low voltage side and The open circuit test is on the
high-voltage side.
11) The copper loss is not affected by the load and the core loss varies with the load.
12) Shunt field winding have a large number of turns compared with a series field winding.
13) The voltage regulation of generator A is 10% and that of generator B is 5%. The generator
A is better than generator B.
14) The external characteristic of a dc generator is affected by armature reaction.
15) The commutating poles or interpoles is connected in parallel with the armature.
16) The dc motor should be started by impressing its rated voltage across the armature
terminals.
17) The…
An ideal auto-transformer has its secondary winding labelled as a, b and c. The primary winding has 100 turns. The number of turns on the secondary side are 400 turns between a and b and 200 turns between b and c. The total number of turns between a and c is 600 turns. The transformer supplies a resistive load of 6 kW between a and c. In addition, a load of impedance 1,000 cis (45°) ohms is connected between a and b. For a primary voltage of 1,000 V, find the primary current and primary input power.
Chapter 13 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
Ch. 13.1 - Assuming M = 10 H, coil L2 is open-circuited, and...Ch. 13.1 - For the circuit of Fig. 13.9, write appropriate...Ch. 13.1 - For the circuit of Fig. 13.11, write an...Ch. 13.2 - Let is = 2 cos 10t A in the circuit of Fig. 13.14,...Ch. 13.3 - Element values for a certain linear transformer...Ch. 13.3 - (a) If the two networks shown in Fig. 13.20 are...Ch. 13.3 - If the networks in Fig. 13.23 are equivalent,...Ch. 13.4 - Prob. 8PCh. 13.4 - Let N1 = 1000 turns and N2 = 5000 turns in the...Ch. 13 - Prob. 1E
Ch. 13 - With respect to Fig. 13.36, assume L1 = 500 mH, L2...Ch. 13 - The circuit in Fig. 13.36 has a sinusoidal input...Ch. 13 - Prob. 4ECh. 13 - Prob. 5ECh. 13 - The circuit in Fig. 13.38 has a sinusoidal input...Ch. 13 - The physical construction of three pairs of...Ch. 13 - Prob. 8ECh. 13 - Prob. 9ECh. 13 - Calculate v1 and v2 if i1 = 5 sin 40t mA and i2 =...Ch. 13 - Prob. 11ECh. 13 - For the circuit of Fig. 13.41, calculate I1, I2,...Ch. 13 - Prob. 13ECh. 13 - Prob. 14ECh. 13 - In the circuit of Fig. 13.43, M is reduced by an...Ch. 13 - Prob. 16ECh. 13 - Prob. 17ECh. 13 - Prob. 18ECh. 13 - Prob. 19ECh. 13 - Note that there is no mutual coupling between the...Ch. 13 - Prob. 21ECh. 13 - (a) Find Zin(j) for the network of Fig 13.50. (b)...Ch. 13 - For the coupled coils of Fig. 13.51, L1 = L2 = 10...Ch. 13 - Prob. 24ECh. 13 - Prob. 25ECh. 13 - Prob. 26ECh. 13 - Consider the circuit represented in Fig. 13.53....Ch. 13 - Compute v1, v2, and the average power delivered to...Ch. 13 - Assume the following values for the circuit...Ch. 13 - Prob. 30ECh. 13 - Prob. 31ECh. 13 - Prob. 32ECh. 13 - Prob. 33ECh. 13 - Prob. 34ECh. 13 - Prob. 35ECh. 13 - Prob. 36ECh. 13 - Prob. 37ECh. 13 - FIGURE 13.60 For the circuit of Fig. 13.60, redraw...Ch. 13 - Prob. 39ECh. 13 - Prob. 40ECh. 13 - Calculate the average power delivered to the 400 m...Ch. 13 - Prob. 42ECh. 13 - Calculate the average power delivered to each...Ch. 13 - Prob. 44ECh. 13 - Prob. 45ECh. 13 - Prob. 46ECh. 13 - Prob. 47ECh. 13 - Prob. 48ECh. 13 - A transformer whose nameplate reads 2300/230 V, 25...Ch. 13 - Prob. 52ECh. 13 - As the lead singer in the local rock band, you...Ch. 13 - Obtain an expression for V2/Vs in the circuit of...Ch. 13 - Prob. 55E
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- Which of the following is not a property of an Ideal Transformer Select one: O a. L1=* Ob. k=1 Oc. R= Od. L2= -lagging powerarrow_forwardQ.1. A power suppply having 220 V AC input and two fixed outputs as 10 V DC and 20 V DC is requested from you. For this purpose, a transformer with 220 V AC input / 15 V AC output, some capacitors, some silicon diodes, and zener diodes are presented.a) Design your power supply and point out DC voltage outputs b) Explain the operation of the network and all the components used in the design .c) Calculate and plot input and output signals of the network.Hint: For design, remember clipper, clamper, rectifier,voltage multiplier and zener circuitsarrow_forwardPlease answer the question step by step and please care to explain the question in detailed with your own sentence and explain why you used that formula, calculations etc asap. Thanks in advance.arrow_forward
- 2. Sketch a simplified equivalent circuit of a transformer X, R, X, R W R, E Figure 1: Parameters for open circuit testarrow_forwardA single-phase distribution transformer has a specified 13.8 KV/ 480 V. When the transformer is excited at nominal voltage on the high voltage side, with the low voltage winding in open circuit, it takes 0.35 A and 1610 W. When the winding low voltage terminal is shorted, and 1000 V is applied to the high voltage terminals, the readings are 66 A and 382 W. Find: a) The values corresponding to the equivalent circuit of the transformer referred to the low voltage side.arrow_forward(b) A forward converter as shown in Fig. 4 (a) below is required to give an output of 30V at 15A from 350V DC source. Electrical isolation is required and the transformer turns ratio (N) should be an integer with the duty cycle of no greater than 0.4. Draw waveforms of ip1 and V2 . Iout D2 RL Vout D3 N2 N3 Fig. 4 (a)arrow_forward
- 19. The primary resistance of a 440/110-V transformer is 0.5 N and the secondary resistance is 0.04 N. When 440-V is applied to the primary and secondary is left open-circuited, 200 W is drawn from the supply. Find the secondary current which will give maximum efficiency and calculate this efficiency for a load having unity power factor. [53 A; 93.58%]arrow_forward-0.1 Hint: The solid green dots indicate polarity. 10 Questio -10 The ideal transformer shown in figure below has N₂/N₁=10. The ratio V₂/V₁ is: 1:n Aurima @WPA MacBook Proarrow_forwardIV- Transformer Design You are requested to design a transformer which will have the following characteristics: Two windings, one primary and one secondary with an E-shape core. Vin = 220 V RMS 16 s Vout < 20 v RMS open circuits 14.5 V < Vout s 16 V on a 100 N resistor. 2 VA < S 35 VA apparent power. Show all steps of your design with calculation. - Indicate current in primary and secondary in both open circuit and with 100 n resistor. Simulate your transformer and show both input and output voltage with the 100 Ω load. Talk about your transformer and wire sizes.arrow_forward
- 3. Calculate the full-load primary and secondary currents of a 5 kVA, 2400/120 V, transformer. Subject: Electrical Apparatus and Devicesarrow_forwardFor the following question, you must draw a transformer circuit. A 480/2400-Vrms step-up ideal transformer delivers 50kW to a resistive load. Calculate: a) the turns ratiob) primary currentc) secondary currentd) apparent power in the primary and in secondaryarrow_forward.. The primary resistance of a 440/1 10-V transformer is 0.5 Q and the secondary resistance is 0.04 n. When 440 V is applied to the primary and secondary is left open-circuited, 200 W is drawn from the supply. Find the secondary current which will give maximum efficiency and cakulate this efficiency for a load having unity power factor. [53 A ; 93.58%]arrow_forward
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