What is the effective resistance between the points A and C in the following network?

Options

A. `(R )/(3)`
B. `(2R)/(3)`
C. `(3R)/(2)`
D. `(R )/(2)`

Answer

B

Explanation

B and D are at the same potential.
`therefore` There is no current in BD.
Resistances 2R, 2R and 2R are in parallel
`therefore` Effective resistance `=(2R)/(3)`