Question

Seven resistances are connected as shown in figure. The equivalent resistance between A and B is

• A. 3 Ω
• B. 4 Ω
• C. 4.5 Ω
• D. 5 Ω

Answer 1

Answer: (B)

4 Ω

Answer 2

So the circuit is a balanced wheatstone bridge.

So current through 8Ω is zero

$R _ { e q } = ( 5 + 3 ) \| ( 5 + 3 ) = 8 \| 8 = 4 \Omega$