Practice question · Numerical answer
A 6 ohm resistor and a 3 ohm resistor are connected in parallel. What is their combined resistance, in ohms?
Hints
- For two resistors in parallel, the combination is their product divided by their sum.
- The product is 18 and the sum is 9.
Show the answer
2
Why
18/9 = 2 ohms. The result is smaller than either branch, which is the signature of a parallel connection: adding another path always gives the current somewhere else to go, so the total resistance drops.
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