Question

for the series combination of three resistors establish the relation r=r1+r2+r3​

Answer 1

Answer:

In parallel connection - 1/R = 1/R1 + 1/R2 + 1/R3

so, 1/R = 1/6 + 1/9 +1/18

1/R = 3+2+1/18. (lcm = 18)

1/R = 6/18

1/R = 1/3

R = 3 ohm

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So, total resistance is 3 ohm.