Verified answer

a ) R/2

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From the Given Circuit,

R parallel to R & parallel to (R+R), that is :

1/Rpq = 1/R + 1/R + 1/(R+R) = 2/R + 1/2R = (2*2 + 1)/2R = 5/2R,

Thus,

Rpq = 2R/5 ohms >====================================< ANSWER

SO,

Answer is : b,) 2R/5 ohms, >=========================< ANSWER

answer is b 2R/5

basically the two resistors are in parallel with the two resistors going to ground which are in series.

-|-----------<R>-----------|

-- -| |

|.< R >------<R>------|

-| |

-|----------<-R>-----------|