Alimentatori - blocco trasformatore
Passage
•
English
•
7th Grade
•
Practice Problem
•
Medium
Corrado Lai
Used 3+ times
FREE Resource
Enhance your content in a minute
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cosa sono gli alimentatori?
Dispositivi che regolano la tensione della corrente elettrica
Dispositivi che aumentano la potenza della corrente elettrica
Dispositivi che trasformano la corrente alternata in corrente continua
Dispositivi che trasformano la corrente continua in corrente alternata
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chi vinse la guerra delle correnti tra Edison e Tesla?
Edison
Nessuno dei due
Tesla
Entrambi
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cosa indica il valore efficace di una grandezza alternata?
Il valore che produce la stessa potenza di una tensione continua
Il valore medio della sinusoide
Il valore minimo della sinusoide
Il valore massimo della sinusoide
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è la tensione di soglia per far condurre un diodo in polarizzazione diretta?
0,7 V
0,5 V
1 V
0,3 V
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cosa succede se un diodo è polarizzato inversamente?
Conduce la corrente
Blocca la corrente
Diminuisce la potenza
Aumenta la tensione
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è la potenza di un trasformatore con due avvolgimenti secondari da 25 V e 2 A ciascuno?
50 VA
100 VA
25 VA
10 VA
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cosa fa un trasformatore collegando in serie due avvolgimenti secondari?
Blocca la corrente
Diminuisce la potenza
Aumenta la corrente
Aumenta la tensione
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