In the arrangement of resistances shown below, the effective resistance between points A and B is

Question

In the arrangement of resistances shown below, the effective resistance between points A and B is (A) 20 Ω (B) 30 Ω (C) 90 Ω (D) 110 Ω

Tardigrade Admin · Accepted Answer

By the concept of balanced Wheatstone bridge, the given circuit can be redrawn as follows <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/197cc1060498ce03118bfaa806c4fa7c-.png" /> ⇒ RA B=(30 × 60/30+60)=20 Ω

Q. In the arrangement of resistances shown below, the effective resistance between points $A$ and $B$ is

$20 Ω$

$30 Ω$

$90 Ω$

$110 Ω$

By the concept of balanced Wheatstone bridge, the given circuit can be redrawn as follows

$\Rightarrow R_{A B} = \frac{30 \times 60}{30 + 60} = 20 Ω$

Q. In the arrangement of resistances shown below, the effective resistance between points A and B is

20Ω

30Ω

90Ω

110Ω