A piece of metallic wire of resistance Ris cut into 3 equal parts. These parts are
then connected in parallel. If the total resistance of this combination is R', then
the value of R: R' is
(A)
1:3
(B) 9:1
(C)
1:9
(D) 3:1.
Answers
Answered by
0
Answer:
Option C. is right 1:9
Explanation:
1:9
each resistance=R/3
In parallel,1/r=3/R+3/R+3/R
1/r=9/R
∴R:r=1:9
Answered by
0
Answer:
(B)9:1
Explanation:
as R is cut into 3 parts, each part equals 3/R
therefore, R' = 3/R + 3/R + 3/R = R/9
so, R/R' = R/R/9
= 9:1
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