Two resistive heating elements of 12 ohms and 6 ohms are connected in parallel. What is their equivalent resistance?
- A3 ohms
- 4 ohms
- C8 ohms
- D18 ohms
Why B is correct
For two parallel resistances, reciprocal values add: 1/12 + 1/6 = 3/12 = 1/4. The equivalent resistance is therefore 4 ohms; 18 ohms would be the series result.