Solved: An unknown length of platinum wire 1.22 mm in
Chapter , Problem 72(choose chapter or problem)
An unknown length of platinum wire 1.22 mm in diameter isplaced as the unknown resistance in a Wheatstone bridge(see 71, Fig. 26-65). Arms 1 and 2 have resistanceof 38.0 f i and 29.2 fi, respectively. Balance is achieved whenR 3 is 3.48 fi. How long is the platinum wire?
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