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Seven resistance are connected as shown ...

Seven resistance are connected as shown in the firgure. The equivalent resistance between `A` and `B` is

A

`3 Omega`

B

`4Omega`

C

`4.5Omega`

D

`5 Omega`

Text Solution

Verified by Experts

The correct Answer is:
b
Equivalent circuit is which is a balanced Wheatstone bridge. Therefore the resistance `8 Omega` of arm `CD` become ineffective. Then `5 Omega and 3Omega` in series and they together are is parallel with `(5+3) Omega`

Net resistance `= ((5+3) xx(5 +3))/((5+3) + (5xx3)) = 4 Omega`
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