A prism is made of wire mesh with each side having equal resistance `R`. A battery of `6 V` and zero internal resistance is connected across `E` and `F` as shown in the figure. The current in the branch `AD`,if `R` is equal of `5 Omega` is

Options

A. `0.6 A`
B. `0.8 A`
C. `0.4 A`
D. `2 A`

Answer

C

Explanation

(c ) The figure can be redrawn as
There will be no current through `I` and `II`.
So `III`, `IV` and `V` will be in series.
`I = (6)/(3R) = (6)/(3 xx 5) = 0.4 A`