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21 May, 23:23

2. A circuit consists of a 10.0-ohm resistor,

a 15.0-ohm resistor, and a 20.0-ohm

resistor connected in parallel across a

9.00-volt battery. What is the equivalent

resistance of this circuit?

(1) 0.200 12 (3) 4.62 1

(2) 1.95.22

(4) 45.012

+2
Answers (1)
  1. 21 May, 23:47
    0
    (3) 4.62 ohms

    Explanation:

    Te equivalent resistance R is gotten from

    1/R = 1/R₁ + 1/R₂ + 1/R₃ where R₁ = 10.0 ohm, R₂ = 15.0 ohm and R₃ = 20.0 ohm

    1/R = 1/10 + 1/15 + 1/20

    1/R = 0.1 + 0.0667 + 0.05

    1/R = 0.2167

    R = 1/0.2167

    R = 4.62 ohms
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