Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 4P
For the iron-core transformer (k = 1) in Fig. 23.58:
Fig. 23.58
- Find the magnitude of the induced voltage Es.
- Find the maximum flux
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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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- An 11 000/230 V, 50 Hz, single-phase, core-type transformer has a core section of 25 cm × 25 cm. If the laminations occupy 10% of the core section, find a suitable number of secondary turns, if the flux density is not to exceed 1.2 T.arrow_forwardA 1 kVA ideal transformer has 240 turns on the primary and 80 turns on the secondary winding. The primary is connected to 200 V, 50 Hz supply, find: iv. The primary and secondary E.M.F. per turn v. The maximum magnetic flux in the core in mwbarrow_forwardQ25. The function of the iron core in the transformer isarrow_forward
- Determine Rz for a 12 V Zener regulator is used with a dc input of 20 V, a load current of 65 mA, and a Zener current of 20 mA. Rz DC Input Zener R diode 91.4 ohms O 14.9 ohms 49.1 ohms O 94.1 ohmsarrow_forwardA 50 kVA transformer has an efficiency of 98% at full load,0.8 p.f. and 97% at half full-load, 0.8 p.f. Determine the full-load copper loss and iron loss. Find the load at which maximum efficiency occurs and also maximum efficiency.arrow_forwardA single-phase transformer has 480 turns on the primary and 90 turns on the secondary. The mean length of the flux path in the core is 1.8 m and the joints are equivalent to an airgap of 0.1 mm. The value of the magnetic field strength for 1.1 T in the core is 400 A/m, the corresponding core loss is 1.7 W/kg at 50 Hz and the density of the core is 7800 kg/m3. If the maximum value of the flux density is to be 1.1 T when a p.d. of 2200 V at 50 Hz is applied to the primary, calculate: a. the cross-sectional area of the core; b. the secondary voltage on no load; c. the primary current and power factor on no loadarrow_forward
- Q23. If DC voltage of 240 V is connected to the primary of a transformer having 1:10 turns ratio, then the voltage across the secondary winding will be.arrow_forwardIn case all the flux from the current coil 1 links with coil 2, the coupling coefficient will * .be equal to ... . of its maximum valuearrow_forwardA 10kva single transformer has turns ratio of 300 / 23. The primary is connected a 1500V, 60Hz supply. Find the secondary voltage on open circuit and the approximate values of the currents in the two windings on full load. Find also the maximum values of the flux.arrow_forward
- The efficiency of a transformer at load 0.8 p.f. Lag is -- at load 0.8 p.f. Lead * equal less than more than none of thesearrow_forwardFor the given circuit below, a step down transformer gives an RMS voltage of 230 V/ 13.7- 0-13.7 V with a load resistance of 2.2 Kiloohms. Assume Silicon diodes are used. Determine the Peak Inverse Voltage of the diode. D. ст R 38.74 O 19.38 O 24.57 O 30.23 leeeearrow_forwardThe primary of a current transformer takes 1 A at a power factor of 0.4 when it is connected across a 200-V, 50Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. What is now the value of primary current?arrow_forward
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