Question 724589: you are an electrician working in an industrial plant. A circuit contains 8 incandescent lamps connected in series across 480 volts. One lamp has burned out, and you must determine which one is the defective. You have available a voltmeter, ammeter, and ohmmeter. Which meter would you use to determine which lamp is defective in the shorter possible time? Explain how you use this meter and why?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! you are an electrician working in an industrial plant.
A circuit contains 8 incandescent lamps connected in series across 480 volts.
One lamp has burned out, and you must determine which one is the defective.
You have available a voltmeter, ammeter, and ohmmeter.
Which meter would you use to determine which lamp is defective in the shorter possible time? Explain how you use this meter and why
:
I think the best and safest way is to use an ohmmeter
:
Turn off the power, Check continuity between lamps 4 & 5 to one end of the line of lights.
If continuity is shown, the defective lamp is among the other 4 lamps.
Check from the that middle point across two lamps on the open side.
Then across the two remaining lamps to determine which one is open.
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