Physics for IGCSE & O level - Electricity (Section 11 - No. 4)
What is the effect on the total resistance of a circuit if a parallel branch is added with a very high resistance?
The total resistance significantly increases.
The total resistance decreases slightly.
The total resistance stays almost the same.
The total resistance significantly decreases.
Forklaring
Adding a very high resistance in parallel doesn't significantly change the total resistance; it's similar to adding a small resistance.