Q&A Forum
1106 questions found
In a 4:1 step-up transformer, 120V is applied to the primary, and the load on the secondary is 1600 Ohms. What is the current in the primary?
- 0.075A
- 1.2A
- 3A
Can anyone explain that?
If on a lead-acid battery, several cell checks of SG read consistently low. Battery needs
- recharging
- replacing
- topping up with distilled water
Shouldnt it be replacing?Because we've already performed several cell checks and it remains low .
The length of a resonant antenna dipole is
- lambda
- lambda/2
- lambda/4
this is wrong in this website is has the same question with the correct answer being "lambda/2" .
If a QFE is set at an airfield and flown to another airfield at the same level above sea level then
- it will probably not need resetting and will read zero
- it will display the airfield height above sea level
- it will not need resetting and will read zero
what is the purpose of the 2 answers here?They are basically the same apart from the word "probably" .
To improve the image or picture when using the WRX (weather radar receiver)
- use longer bursts
- use shorter bursts
- scan at a lower rate
i think this is wrong my notes from my academy say 'scan at lower rate" .