Choose the correct statement of a no load singlephase transformer from the followingO a. The magnetizing component of no loadcurrent (Im) leads the core loss component ofno load current (Ic)O b. The magnetizing component of no loadcurrent (Im) lags the core lossComponent ofno load current (Ic)O c. The magnetizing component of no loadcurrent (Im) and the core loss component ofno load current (Ic) are in phase each otherO d. The magnetizing component of no loadcurrent (Im) leads the core loss component of

The magnetizing component of no load current Im lead the core loss component of no load current Ic.…

Choose the correct statement of a no load single phase transformer from the following O a. The magnetizing component of no load current (Im) leads the core loss component of no load current (Ic) O b. The magnetizing component of no load current (Im) lags the core loss Eomponent of no load current (Ic) O c. The magnetizing component of no load current (Im) and the core loss component of no load current (Ic) are in phase each other O d. The magnetizing component of no load current (Im) leads the core loss component of

Choose the correct statement of a no load single phase transformer from the following O a. The magnetizing component of no load current (Im) leads the core loss component of no load current (Ic) O b. The magnetizing component of no load current (Im) lags the core loss Eomponent of no load current (Ic) O c. The magnetizing component of no load current (Im) and the core loss component of no load current (Ic) are in phase each other O d. The magnetizing component of no load current (Im) leads the core loss component of

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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63/ Choose the incorrect statement of a no load single phase transformer from the following a. The primary induced emf (E1) is in phase with the secondary induced emf (E2) b. The no load current (Io) leads the core loss component of no load current (Ic) c. The no load current (Io) lags the core loss component of no load current (Ic) d. The secondary induced emf (E2) lags the magnetic flux by 90 degree
Some power devices have bidirectional current capability Select one: O a. True b. False The voltage regulation of the transformer will depend on the load Select one: O a. For mainly inductive or resistive load, the voltage regulation is negative O b. For mainly capacitive, inductive or resistive load, the regulation is positive Oc. For mainly capacitive load, voltage regulation is positive and other loads it is negative. O d. For mainly capacitive load, voltage regulation is negative.
B/ Fill in the blanks: 1. The purpose of providing the iron core in the transformer is to 2. A transformer transforms... 3. Power transformers are designed to have maximum efficiency at 4. The transformer ratings are usually expressed in terms of menm
Efficiency at full-load and half the full-load at 0.8 p.f. lagging current. Equivalent reactance referred to primary & referred to secondary..........ohm , ..........ohm Equivalent resistance referred to primary & referred to secondary..........ohm , ..........ohm Regulation of transformer at 0.5 p.f. lagging current The magnetizing current and reactance component of no-load are.........amper , .........ohm The working current and resistance component of no-load are.........amper , .........ohm *
Q5:Choose the correct answer from the given alternatives (answer five only) 1.In an ideal transformer, (a) windings have no resistance (b) core has infinite permeability (d) all of the above. (c) core has no losses 2. The primary and secondary induced e.m.fs. El and E2 in a two-winding transformer are always: (a) equal in magnitude (b) in-phase with each other (c) antiphase with each other (d) determined by load on transformer secondary. 3. In relation to a transformer, the ratio 20 : 1 indicates that (a) there are 20 turns on primary one turn on secondary (b) secondary voltage is 1/20th of primary voltage (c) primary current is 20 times greater than the secondary current. (d) for every 20 turns on primary, there is one turn on secondary. 4. A transformer has negative voltage regulation when its load power factor is: (a) zero (b) lagging. (d) unity (c) leading
Vr 3. For a 1.2 accuracy class potential transformer used at a lagging phase angle y of 10', the RCF value is A. 0.991. B. 0.988. C. 0.977. D. 0.999. primary connection scheme that must be used with
For given base voltage and base volt-ampere, the pu leakage impedance of a transformer is 'x'. What will be the pu leakage impedance of this transformer when the voltage and volt ampere bases are both doubled?
Choose the correct answer from the given alternative: 1. In an ideal transformer, (a) windings have no resistance (c) core has no losses (b) core has infinite permeability (d) all of the above. 2. The primary and secondary induced e.m.fs. El and E2 in a two-winding transformer are always: (a) equal in magnitude (b) in-phase with each other (c) antiphase with each other (d) determined by load on transformer secondary. 3. In relation to a transformer, the ratio 20: 1 indicates that (a) there are 20 turns on primary one turn on secondary (b) secondary voltage is 1/20th of primary voltage (c) primary current is 20 times greater than the secondary current. (d) for every 20 turns on primary, there is one turn on secondary. 4. A transformer has negative voltage regulation when its load power factor is: (a) zero (b) lagging. (d) unity (c) leading 5. During short-circuit test, the iron loss of a transformer is negligible because: (a) the entire input is just sufficient to meet Cu losses only…
In a single phase transformer when all parameter is shifted to primary side value of primary side resistance is 0.5 ohm and resistance which is shifted from secondary to primary is also 0.5 ohm. If full load current in primary side is 20(A) what is total copper loss in transformer.
NEAT EXPLAIN NEEDED( CORRECT ANSWER NO GPT PLEASE)
5. Write down the equations of a single phase transformer at no-load mode. Give the names of the resistances, reactance, e.m.f.'s, currents and voltages.