The maximum efficiency of a 100 kVA, 6600/240 V 60 Hz single phase transformer occurs at half load and is 95% at unity pf, what is the full load efficiency at 0.7 pf? Group of answer choices 93.72% 91.41% 94.11% 92.37%

Q: voltage regulation

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Q: Whether a transformer shifts an ac waveform by 0° or 180° depends on the phasing of the waveform…

A: Shifts of ac waveform by 0 to 180 degree is depending on

Q: A 209 V / 125 V single-phase transformer has a core loss of 120 W and the no-load current is 0.7 A.…

A: We need to calculate power factor .we will use given data to calculate power factor

Q: A small filament transformer has a laminated sheet steel core whose average path length is 20cm and…

A: Given Average path lenght = 20 cm Cross sectional area = 5 cm2 Primary winding connection 120 V and…

Q: A transformer has a rated output of 300 kVA at a power factor of 1.2. Determine the rated power…

A: Please comment if you need any clarification. If you find my answer useful please put thumbs up.…

Q: Problem: For the given circuit as shown in figure a) Find the equivalent reactance b) Draw the…

A: Solution !!

Q: transformer is called single winding transformer. O Three phase O Auto O 1:1 O Isolation

A: Correct option is auto transformer that is 2nd option is correct

Q: The number of turns on the primary and secondary windings of a 1-p transformer are 350 and 42…

A: Given : A single phase transformer having number of turns on the primary and secondary winding are…

Q: A 3-phase 100OKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: In a single phase transformer, if the RMS value of emf is 240 V, then the average value is.

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Q: I will upvote for correct answer A transformer has a rated output of 300 kVA at a power factor of…

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Q: 50-kVA, 13,200/480-V distributed transformer, the no-load current will be around Select one: O a.…

A: No loade current is always (0-5%) ofRated currentif transformer iscase1 single phaseH.V…

Q: A single-phase 800 V/100 V, 50 H transformer has a core maximum density of 1.8 Wb/m² and an effe…

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Q: For the following circuit if the secondary voltage of the transformer is 20V rms, the output voltage…

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Q: mer has primary and 80 turns on the secondary. The primary 2. A 100 KVA transf and secondary…

A: Given data, The rating is 100kVA. Primary resistance  = 0.3Ω Secondary resistance  = 0.1Ω Primary…

Q: A 205 V/ 129 V single-phase transformer has a core loss of 124 W and the no-load current is O0.8 A.…

A: In the question, given  a single phase transformer 205/129V  Core loss Po= 124W Current at no load =…

Q: The various types of errors in dynamometer wattmeters are A./Error due to Eddy currents B./Error…

A: The solution is given

Q: If the no load secondary voltage of a 1-phase transformer is 232 V and full load secondary voltage…

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Q: A single-phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu…

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Q: connection of transformer is used to convert three phase to single phase. In a DC machine, e.m.f…

A: Scott T Transformers  is used to convert three phase to single phase.    It  uses teaser transformer…

Q: What are the different losses across the transformer? Which losses are variable? What turns ratio…

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Q: In a single phase transformer, if the average value of emf is 239 V, then RMS value is

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Q: 8A (L 2A

A: In source transformation, one source works at a time. When 8 A is OC , 9 ohm and 3 ohm resistors…

Q: 05 V/ 129 V single-phase transformer has a core loss of 124 W and the no-load current is 0.8 A. The…

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Q: In no load Phasor diagram of practical transformer, the core loss current Ic is with primary voltage…

A: When a transformer is on no-load, the secondary is open circuited. Hence secondary current is zero.…

Q: A step-up transformer is designed so that the output of its secondary winding is 2,200 V (rms) when…

A: Given: A step up transformer is designed to have V1=210 VV2=2200 V

Q: A 3-phase 10OOKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: If the no load secondary voltage of a 1-phase transformer is 233 V and fullI load secondary voltage…

A:

Q: A current transformer has a phase error of +3°. The phase angle between the primary and secondary…

A: Given: A current transformer has, Phase error = +3°

Q: Ql-phase step down transformer 1250 KVA, 11000/2200 V, 50 Hz . The resistance /phase and leakage…

A: Given: KVA=1250, V1/V2=11000/2200Primary impedance=0.78+j4.8ΩSecondry impedance=0.01+j0.06Ω

Q: Determine the peak-to-peak ripple and dc output voltages. The transformer has a 36 Vrms secondary…

A: Given, RMS voltage at the secondary side of the transformer, Vs=36 V Supply frequency, f=60 Hz…

Q: In small transformers, the total iron losses may vary from % of the rated output. O 0.5 to 1 O 0.2…

A: They can either be graphite or precious metal brushes which have electrical motor connections. To…

Q: A multitap transformer has 1500 turns on the primary, 100 turns between B and C, 600 turns between A…

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Q: A three phase power transformer having a line voltage ratio of 400 V to 33 kV is connected in…

A: We have an three-phase power transformer as shown in figure, Voltage ratio = 400 V / 33 KV Current…

Q: A 212 V/ 116 V single-phase transformer has a core loss of 124 W and the no-load current is 0.7 A.…

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Q: A Transformer having 259 V in the primary with a primary current of 14 A. For a secondary Voltage of…

A: In this question , we will find transformer secondary current with given data...

Q: Which of the following quantities is increase in a step-down transformer? O Current O Voltage O…

A: As per the definition, the transformer is a device that can convert one voltage level to another…

Q: A transformer has a rated output of 400 kVA at a power factor of 0.6. Determine the rated power…

A: Rated output (S) = 300 kVA Power factor (ϕ) = 0.6 We have to find the rated power output and the…

Q: Maximum flux density in the core of a 250 V/3000 V, 50 Hz single phase transformer is 0.6 Wb/m². RMS…

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Q: Calculate the primary leakage reactance of a transformer, supplying a load current of 10 A and 60…

A: Inductance = No. of turns×FluxCurrent Leakage inductance in primary = No. of primary turns×rms value…

Q: The no-load current in the transformer lags behind the applied voltage by phase angle about *

A: The current lags the no load voltage with phase angle about 75o.