Question

When three resistors, each of resistance R, are connected in parallel, the effective resistance is 102. Hence, R must be . .

(a) 5 0 (b) 10 2 (c) 20 2 (d) 30 2​

Answer 1

Answer:

resistance in parallel=1/Rt

let R1=R2=R3=let it be x

and 1/Rt =1/R1 +1/R2 +1/R3

1/102=1/x +1/x +1/x

1/102=3/x

by cross multiplication

x=102×3

306ohm is correct answer

so we can choose nearest answer which is (D).302 ohm

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Answer 2

Explanation:

When three resistors, each of resistance R, are connected in parallel, the effective resistance is 102. Hence, R must be . .