Questions
Each of the resistances in the network shown in fig
in equal to ,R. The resistance between the terminals A and B is
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a
R
b
5 R
c
3 R
d
6 R
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Correct option is A
The equivalent circuit is shown the fig. Since the Wheatstone's bridge is balanced, therefore no current will flow through the arm KL. Equivalent resistance between AKM = R+R= 2R Equivalent resistance between ALM = R+R= 2R The two resistances are in parallel. Hence equivalent resistance between A and B is given by1R′=12R+12R=22R=1RR′=RSimilar Questions
Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is
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