Question

Find the effective resistance of the circuit as shown in the figure.

• A. 10 ohm
• B. 5 ohm
• C. 15 ohm
• D. 4 ohm

Answer 1

Answer: (B)

5 ohm

Equivalent resistance between A and B, $R_{AB}=6\parallel 3=\frac{6\times 3}{6+3}=2\Omega$

Equivalent resistance between C and D, $R_{CD}=4\parallel 4=2\Omega$

Equivalent resistance between M and D, $R_{MD}=(4+2)\parallel (4+2)=3\Omega$

$\therefore$ Effective resistance of the circuit $R_{eq}=R_{AB}+R_{MD}=2+3=5\Omega$