Question

For the network shown in the figure, what is the effective resistance between A and B ?

• A. $5\Omega$
• B. $10\Omega$
• C. $15\Omega$
• D. $20\Omega$

Answer 1

The correct option is A

$5\Omega$

1. We can clearly see from the given network that the resistors are in parallel connections.
2. So equivalent resistance will be $\frac{1}{R_{eq}}=\frac{1}{12}+\frac{1}{15}+\frac{1}{20}=\frac{12}{60}=\frac{1}{5}{\Omega }^{-1}$
3. Therefore, $R_{eq}=5\Omega$

So, the correct option is (A) i.e. $5\Omega$