Question: What is the total resistance in a parallel circuit with a 5Ω and a 10Ω resistor?

Options:

1. 3.33 Ω
2. 15 Ω
3. 5 Ω
4. 7.5 Ω

Correct Answer: 3.33 Ω

Solution:

1/Rtotal = 1/R1 + 1/R2 = 1/5 + 1/10. Rtotal = 3.33 Ω.