Question

Three resistors having resistances 2 $\Omega$, 3 $\Omega$ and 4 $\Omega$ are connected so that the equivalent resistance is 9 $\Omega$. The resistors are connected in:

• A. all in series
• B. all in parallel
• C. 2 and 3 in parallel and the combination in series with 4
• D. 2 and 3 in series and the combination in parallel with 4

Answer 1

The correct option is A

all in series

In series, $R_{eq}$= $R_1$ + $R_2$ +$R_3$

Now, 2 + 3 + 4 = 9 $\Omega$ satisfy the equation.

So all the resistors are in series.