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

- - 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

10.9 ohms.

1.1 Amperes