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Q.

What are the maximum and minimum values of unknown resistance X, which can be determined using the post office box shown in the below figure?

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a

1111kΩ and 0.01Ω

b

1001kΩ and 0.01Ω

c

1101kΩ and 0.01Ω

d

1000kΩ and 0.01Ω

answer is A.

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Detailed Solution

X=QRPXmax=QmaxRmaxPmin=100010(11110)=1111kΩXmin=QminRminPmax=(10)(1)1000=0.01Ω
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