The various types of errors in dynamometer wattmeters are A./Error due to Eddy currents B./Error due to pressure coil inductance C./All of above D./Error due to pressure coil capacitance E./Error due to friction   2.The primary winding of a potential transformer has A./no turns B/a larger number of turns C/a few turns only D/intermediate number of turns   3. The current transformer (CT) and potential transformer (PT) are used for A.measuring low current and voltages B.measuring high resistances and frequencies C.measuring very low current and voltages D.measuring high currents and voltages   4. The secondary winding of a potential transformer has

Q: A IcA B The voltage ratio in the following transformer equals to, Inc VAN/N1 Van/N2 Van/N1 Vab/N2

A: In this question, choose the correct option  What is the voltage ratio of the given transformer.

Q: Answer by true or false * True False while conducting short- circuit on transformer the low voltage…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Below is a time current curve (TCC), showing the damage curve of a transformer. Draw (roughly),…

A: TCC- Time Current Curve is a plot shows the overcurrent device's interruption time which is based on…

Q: If the turn ratio of a step-up transformer is 1:15 and the full-load secondary current is 300 A, the…

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Q: What is the purpose of lighting arrester in the transformer

A: A lightning arrester, also known as a surge arrester or lightning rod, is a protective device used…

Q: A 5 kV/ 112 V, 50 Hz, single-phase transformer is to have an approximate E.m.f. per turn of 27 V and…

A: 5KV/112 V, 50Hz single phase transform have per turn emf= 27V. Flux density B =1.55T Flux = B.A  A…

Q: Which of the following voltage (V), current (1), ar turns (N) characteristics apply for a step-up…

A: In this question we will define step up transformer....

Q: Explain in shortly what is the on load tap changing transformer?

A: In power system, with change in load the value of the voltage also vary. Generally at low load the…

Q: In transformer, loss that is related to ohmic resistance of winding is

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Q: 2. A 60-Hz single-phase transformer has a turns ratio (a = Nı/N2) of 0.5. The resistive load on the…

A: The secondary side voltage of transformer,

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: find the voltage on primary side in pu.

A: Given that, Primary Voltage (V1)=2000 V, Secondary Voltage (V2)=200 V, Primary Impedance (Z1)=0.12+…

Q: 11) Which phenomenon is used in transformer to change the values of alternating voltages and…

A: Given that Which phenomenon is used in transformer to change the values of alternating voltages and…

Q: Three Phase Transformer 3 Three Phase Transformer 4 Transformer 2 Transformer 4 Transformer 1…

A: Four circuit connections are given in the question.Note: For all the transformers the primary side…

Q: To prevent the harmful voltage induction by the series winding, the transformer primary must before…

A: To prevent the harmful voltage induction by the series winding, the transformer primary side must…

Q: The hysteresis loop of the core material of a transformer should have (a) a large area (b) a small…

A: When a transformer is in use, its core is taken up by many complete magnetization cycles. During…

Q: How is the EMF of a three phase transformer

A: TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…

Q: single phase transformer

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Q: The open-circuit voltage of 246 V and the full load secondary voltage of 230 V, then the %…

A: In this question we will find percent voltage regulation of transformer....

Q: The power is transferred by induction and conduction in autotransformers               2-No ­load…

A: Check the given statements are true or false? All statment are related to the transformer.

Q: A single-phase 685 V/ 1496 V, 55 Hz transformer has a maximum core flux density of 2 Tesla and an…

A: In this answer we will find the number of turns in the primary winding by using the emf equation as…

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: The primary winding of a 220/6 V, 50 Hz transformer is energized from 220 V, 60 Hz supply. The…

A: Considering v1 as the primary voltage at the frequency f1 and v2 as the primary voltage at the…

Q: In a transformer the core loss component is 90 degrees with the flux Select one: O True O False

A: Given: Core loss component .   In no load condition of transformer ,the secondary is open circuited…

Q: In no load phasor diagram of practical transformer, the magnetizing current is with primary voltage…

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Q: A 100VA single-phase transformer inside a refrigerator has 100 turns in its primary coil and 20…

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Q: In no load Phasor diagram of practical transformer, the iron loss current lc is with flux 0. O In…

A: In the question,  Fill the given blank from the given option.    In the load phasor diagram of…

Q: A transformer has equivalent resistance referred to secondary R02 and reactance referred to…

A:

Q: voltage per winding of the 220V/12V, 60 Hz single phase core transformer is 2V. If the maximum flux…

A: We know direct formula of per winding voltage. From that formula we will find out cross section…

Q: What is the reason of humming sound in transformer?

A: Humming sound from a transformer can be caused by several factors, including: Magnetic Hysteresis:…

Q: With the aid of simple sketches explain briefly the meaning of transformer polarity and terminal…

A: Given: Explain briefly the meaning of transformer polarity and terminal marking.

Q: Given this transformer with load, what is the expected phase of the primary and secondary voltage?…

A: The solution is provided in the following section.

Q: QUESTION 4 A real transformer has 1500 turns on the primary and 2000 turns on the secondary. Rp =…

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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.

Q: Find out the equivalent inductance for the combination when 2 inductances L1 and L2 are connected in…

A: Note as there two different questions and we are asked to solve one question at a time. So repost…

Q: Which of the following is the correct equation for calculating the rated current for a single-phase…

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Q: What is this transformer? Does it have coils ?

A: A flyback transformer is a special type of transformer commonly used in switching power supplies and…

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.