Final answer:
Synchronizing alternators is important to ensure stable power supply and prevent damage to the electrical system. Slip is present in induction motors, not in alternators.
Step-by-step explanation:
In order to prevent issues such as unstable power supply or damage to the electrical system, it is important to synchronize alternators. Synchronization ensures that multiple alternators connected in parallel are producing electricity at the same frequency and in phase with each other.
Slip exists in induction motors, not in alternators. Slip is the difference between the synchronous speed and the rotor speed of an induction motor, and it allows the motor to generate torque. Alternators, on the other hand, do not rely on slip; they are designed to generate electricity at a constant synchronous speed.