J & K CET Medical
J & K - CET Medical Solved Paper-2001
question_answer
Three equal resistors each equal to r are connected as shown in the given figure. The equivalent resistance between points A and B is:
A) r
B) 3r
C)\[\frac{r}{3}\]
D)\[\frac{2}{3}r\]
Correct Answer:
C
Solution :
The given network resistances can be replaced successively by the networks. Hence, the three resistors are connected in parallel, hence equivalent resistance is \[\frac{1}{R}=\frac{1}{r}+\frac{1}{r}+\frac{1}{r}=\frac{3}{r}\Rightarrow R=\frac{r}{3}\]