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Question

Seven resistors are connected as shown in the diagram.

The equivalent resistance in Ω of this network between A and B is:

A
6
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B
8
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C
12
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D
20
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Solution

The correct option is A 6
The given circuit is equivalent to


As 10×4=5×8, therefore this is balanced Wheatstone network
R=(5+4)×(10+8)9+18=6 Ω

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