what is a post office box in electricity
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A post office box is a practical form of wheat stone bridge. It is a testing device used to locate faults which may be miles away. It was used by the engineers in UK to determine where a break occurred in the cable.
Answered by
1
A post office box is a practical form of wheatstone bridge. It is a testing device used to locate faults which may be miles away. It was used by the engineers in UK to determine where a break occurred in the cable
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