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Answer to Question #32849 in Electric Circuits for Aaron Okievs.
Question #32849
A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series to to a resistance R and a cell of emf 2V and negligible internal resistance. A source of emf of 10mV is balanced by a length of 40cm of the potentiometer wire. What is the value of the resistance R?
a. 200Ω
b. 950Ω
c. 2000Ω
d. 790Ω
a. 200Ω
b. 950Ω
c. 2000Ω
d. 790Ω
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