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Three unequal resistors in parallel are equivalent to a resistance 1 . If two of them are in the ratio 1:2 and if no resistance value is fractional, the largest of the three resistance in ohm is



Question ID - 151713 | SaraNextGen Top Answer

Three unequal resistors in parallel are equivalent to a resistance 1 . If two of them are in the ratio 1:2 and if no resistance value is fractional, the largest of the three resistance in ohm is

1 Answer
127 votes
Answer Key / Explanation : (6) -

Let the resistances be  and

In parallel   

If k=1, then  is found to be negative, which is impossible.

If k=2, then

, not satisfying the condition of the question that all resistance are unequal.

∴  Largest resistance =6

127 votes


127