Physics for IGCSE & O level - Electricity (Section 4 - No. 12)
What happens to the total current in a parallel circuit if one of the branches is opened (the circuit is broken in that branch)?
The total current increases.
The total current decreases.
The total current remains the same.
The total current becomes zero.
Explication
Opening a branch reduces the number of paths for current to flow, hence the total current will decrease.