For post office box arrangement to determine value of unknown resistance unknown resistance should b

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3.Current Electricity

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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

$B_1 \,and \,C_1$

(IIT-2004)

Solution

(c) Post office box is based on the principle of Wheatstone's bridge

Standard 12

Physics

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