Q&A Forum
1131 questions found
Aspect ratio is given by the formula:
- Mean Chord / Span.
- Span^2 / Area.
- Span^2 / Mean Chord.
sasna asking:
not too clear about the answer
A 20 Picofarad capacitor with a 1 Megohm resistor takes how long to charge?
- 100 microseconds.
- 20 milliseconds.
- 1 second.
sasna asking:
pls solve
What is the mutual inductance if two coils of 10mH and 500mH have 90% of the flux transferred from one to the other?
- 459mH.
- 5mH.
- 63mH.
sasna asking:
pls solve it for me
In a an DC motor, the rotation of the MNA
- is opposite to the rotation of the armature.
- is slightly less speed than the rotation of the armature.
- is the same as the rotation of the armature.
Faiz0108 asking:
Wouldn't the rotation of MNA be in the same direction as rotation of armature?
The secondary coil of a transformer has 1500 turns and 10Ohm resistance. The primary coil has 1kOhm resistance. How many turns does the primary coil have?
- 15,000.
- 1,500,000.
- 150,000
Faiz0108 asking:
How does the answer comes to 15000?