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For the post office arrangement to deter...

For the post office 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)`

Text Solution

Verified by Experts

Equivalent wheat-stone bridge of the given Post Office circuit `AB,BC` and `CD` are known resistance The unknown resistance is connected between `A` and `D` Hence the correct option is `(C)`
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For the post office box arrangement to determine the value od 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) . .

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Knowledge Check

  • In above question the value of unknown resistance is

    A
    `664Omega`
    B
    `100Omega`
    C
    `348Omega`
    D
    `864Omega`

  • Shown in figure is a Post Office box. In order to calculate the value of external resistance, it should be connected between

    A
    B' and C
    B
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    C
    C and D
    D
    B and D

  • In the circuit shown here, what is the value of the unknown resistor R so that the total resistance of the circuit between points P and Q is also equal to R

    A
    3 ohms
    B
    `sqrt(39)` ohms
    C
    `sqrt(69)` ohms
    D
    10 ohms

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