Question

Each resistance shown in the figure given is $7$ $\Omega$. The resultant resistance between A and B is:

• A. 4$\Omega$
• B. 6$\Omega$
• C. 9.33$\Omega$
• D. 12$\Omega$

Answer 1

The correct option is A 4$\Omega$

Let resistance be R for each resistance.
Then from the circuit.
$R_{eq}=\frac{\frac{4R}{3}\times R}{\frac{4R}{3}+R}$$=\frac{4R}{7}$
Given $R=7\Omega \Rightarrow R_{eq}=4\times \frac{7}{7}=4\Omega$