Q&A Forum
1106 questions found
A 4:1 step down transformer draws 115 V and 1 A. The output power will be
- 28.5 V at 16 A.
- 460 V at 0.25 A.
- 28.5 V at 4 A.
Jordi asking:
why?
Three capacitors connected in series, each having a value of 12 picofarads, calculate the total capacitance
- 36 picofarads.
- 4 picofarads.
- 12 picofarads.
Jordi asking:
i think it is 36
The secondary winding of a transformer has an impedance of 10 ohms and 1500 turns. For the primary winding to have an impedance of 1 kilohm, how many turns must it have?
- 15,000.
- 1,500,000.
- 150,000
Jordi asking:
why
In a series LCR circuit at resonance, R = 100 ohms, L and C are each 10 ohms. The total impedance is
- zero ohms.
- 100 ohms.
- 30 ohms.
Jordi asking:
why?
If the phase voltage of a star wound generator is 115V, what would be the line to line voltage?
- 220V.
- 180V.
- 200V.
Jordi asking:
why?