The equivalent resistance across P and Q in the given electric circuit will be

Options

A. `1Omega`
B. `2Omega`
C. `3Omega`
D. `5Omega`

Answer

A

Explanation

This is balanced Wheatstone's bridge. Thus, the resistance ` 2 Omega` is ineffective and ` 1 Omega` and `1 Omega ` are in series and `1 Omega` and `1 Omega` are in series.
Thus, `R_(s1)=1+1=2Omega` and
`R_(s2)=1+1=2Omega` are in parallel,
so effective resistance is ,