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charle [14.2K]
4 years ago
8

Round your answers to one decimal place. This parallel circuit has two resistors at 15 and 40 ohms. What is the total resistance

? Ω If there is a 12 V battery in the circuit, what would the approximate current be? A
Physics
2 answers:
Dmitriy789 [7]4 years ago
7 0

Answer:

10.9 ohms .

 1.1 Amperes  

Explanation:

goldenfox [79]4 years ago
4 0
-- With two resistors in parallel, the total effective resistance is
the reciprocal of  (1/R₁ + 1/R₂).

1/R₁ + 1/R₂  = 1/15 + 1/40

= 8/120 + 3/120

= 11/120

So the total effective resistance is 120/11 = 10.9 ohms .

Current = (voltage) / (resistance)

= 12 / (120/11)

= (12 · 11) / 120

= 132/120  =  1.1 Amperes  
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