Question

) Three resistances, each of 1 ohm, are joined in parallel. Three such combinations are put in series, then the resultant resistance will be [MP PMT 1994]
A) 9 ohm B) 3 ohm C) 1 ohm D) \frac{1}{3}ohm

Answer 1

In the parallel connection each combination will give 1/3 resistance and then when three combination are connected in series it will give (C) 1 ohm resistance

Answer 2

Answer:1 ohm

Explanation:

First parallel....1/R =1+1+1=3

R= 1/3 ohm

Then series...

R= R1 +R2 +R3

= 1/3 +1/3 +1/3

= 1ohm