Q&A Forum
1131 questions found
A transformer should always have its
- primary shorted or off load.
- secondary shorted or on load.
- secondary open circuit or on load.
chandra.shrestha1988 asking:
Shouldn't it be secondary shorted or on load?
In a CRT, if the magnetic field is parallel to the Y plates, what will be the direction of the electron beam movement?
- Diagonal.
- Vertical.
- Reversed.
bucks asking:
if the magnetic field is parallel to the Y axis why the movement of the beam is not horizontal? i know that the beam have to move in a direction that's perpendicular to the magnetic force lines...is it wrong?
An increase in operating temperature in most electrical devices carrying current results in
- a decrease in resistance and an increase in current.
- no effect on the resistance and current.
- an increase in resistance and a decrease in current.
santro asking:
isnt R inversly proprtion to Temp? Help
The poles of a DC generator are laminated to
- reduce hysteresis losses.
- reduce flux losses.
- reduce eddy current losses.
santro asking:
isnt it eddy current?? Help
A perforated ear drum could occur if
- you were exposed to intermittent noise above 25 kHz.
- you frequently blew your nose with excessive force.
- you were subjected to continuous noise below 8 kHz.
santro asking:
isnt it normal for 20Hz to 20 Khz?? confused. please clearify