Question

Circuit has 3 ohm 9 ohm and 18 ohm resistor connected in parallel how much will be its equivalent resistance

Answer 1

Answer:

equivalent resistance = 2 ohm

Explanation:

Given:- r1 = 3 ohm

r2 = 9 ohm

r3 = 18 ohm

it is given that these resisters are joined in parallel.

so, using parallel formula

1/r = 1/r1 + 1/r2 + 1/r3

1/r = 1/3 + 1/9 + 1/18

1/r = 6 + 2 +1 / 18

1/r = 9 / 18

1/r = 1 / 2

r = 2 ohm

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