Question 134: Current Electricity

Question

Find the equivalent resistance between two ends of the following circuit

Accepted Answer

Here, $${V_A} = {V_C}$$ & $${V_B} = {V_D}$$
So,
So resistances are in parallel combination.
We know, $${1 \over {{R_p}}} = {1 \over {{R_1}}} + {1 \over {{R_2}}} + {1 \over {{R_3}}}$$
$$ \Rightarrow {1 \over {{R_p}}} = {3 \over r} + {3 \over r} + {3 \over r} = {9 \over r}$$
$$ \Rightarrow {R_p} = {r \over 9}$$

Answer

r

Answer

$\frac{\mathrm{r}}{6}$

Answer

$\frac{\mathrm{r}}{3}$

Answer

$\frac{r}{9}$

Current Electricity

Find the equivalent resistance between two ends of the following circuit

Choose the correct answer: