Option 1: Double
Option 2: Half
Option 3: One-fourth
Option 4: Four times
Correct Option: 3
Explanation
On changing from parallel to series → flux increases and voltage per motor decreases leading to speed becoming one-fourth of previous value.
Option 1: Double
Option 2: Half
Option 3: One-fourth
Option 4: Four times
Correct Option: 3
On changing from parallel to series → flux increases and voltage per motor decreases leading to speed becoming one-fourth of previous value.