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QCM  sur Transformateur monophasé



Voici un  QCM  sur transformateur monophasé pour tester vos  compétences sur domaine électrique et pour bien préparer les concours, avant résoudre ce QCM en transformateur monophasé, essayer de préparer bien les cours des circuits électriques en général  .




QCM  sur Transformateur monophasé




QUIZ sur les transformateurs monophasés


Question 1/5 : Transformateur monophasé

Rapport de transformation


Un transformateur monophasé 50 Hz ont donné  deux essais:

Essai à vide : U1N = 230 V ; U2V = 27 V ; P1V = 5 W
Essai en court-circuit : U1CC = 25 V ; P1CC = 14 W ; I2CC = I2N = 6 A

Quel est le rapport de transformation à vide  :


 A) 8,52
 B) 0,117
 C) 0,109
 D) 1,08

Question 2/5 : Transformateur monophasé 

Pertes joules


Un transformateur monophasé 50 Hz ont donné deux essais :

Essai à  vide : U1N = 230 V ; U2V = 27 V ; P1V = 5 W
Essai en court-circuit : U1CC = 25 V ; P1CC = 14 W ; I2CC = I2N = 6 A

Quels sont  pertes Joule nominales  :


 A) 5 W
 B) 14 W
 C) 19 W
 D) 0 W

Question 3/5 : Transformateur monophasé

Résistance des enroulements 


Un transformateur monophasé 50 Hz ont donné deux essais :

Essai a  vide : U1N = 230 V ; U2V = 27 V ; P1V = 5 W
Essai en court-circuit : U1CC = 25 V ; P1CC = 14 W ; I2CC = I2N = 6 A

Calculer  la valeur de RS (résistance des enroulements ramenée au secondaire) ?


 A) 0,39 Ω
 B) 0,14 Ω
 C) 2,3 Ω

Question 4/5 : Transformateur monophasé

Impédance interne



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Un transformateur monophasé 50 Hz ont donné deux  essais:

Essai à vide : U1N = 230 V ; U2V = 27 V ; P1V = 5 W
Essai en court-circuit : U1CC = 25 V ; P1CC = 14 W ; I2CC = I2N = 6 A

calculer  la valeur de l'impédance interne ZS ?


 A) 4,5 Ω
 B) 4,17 Ω
 C) 0,49 Ω


Question 5/5 : Transformateur monophasé

Réactance magnétique

Un transformateur monophasé 50 Hz ont donné deux essais :

Essai à  vide : U1N = 230 V ; U2V = 27 V ; P1V = 5 W
Essai en court-circuit : U1CC = 25 V ; P1CC = 14 W ; I2CC = I2N = 6 A


Trouver  la relation entre RS, ZS et XS (réactance des fuites magnétiques ramenée au secondaire) ?


 A) XS2 = ZS2 - RS2
 B) XS2 = ZS2 + RS2
 C) XS = ZS - RS




 Ce QCM  a traité comment calculer les grandeurs électriques des transformateurs monophasés et différents type  de  puissance électriques et rendement et quelques formules dans le  domaine  électrique  bon courage .




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