Q.

Three unequal resistors in parallel are equivalent to a resistance 1 ohm. 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

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a

4

b

6

c

8

d

12

answer is B.

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Detailed Solution

1R1+1R2+1R3=1R2:R3=1:2
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Three unequal resistors in parallel are equivalent to a resistance 1 ohm. 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