Question

For the post office box arrangement to determine the value of unknown resistance, the unknown resistance should be connected between

• A. B and C
• B. C and D
• C. A and D
• D. $B_1 \, and \, C_1$

Answer 1

Answer: (C)

A and D

Answer 2

BC, CD and BA are known resistances. The unknown resistance is connected between A and D.
Hence, the correct option is (c).