# The speed of Universal Motor is

The speed of Universal Motor is

### Right Answer is:

Greater in DC

#### SOLUTION

- A universal motor is a series-wound or compensated series-wound motor designed such that it operates at approximately the same speed, giving the same output on either a DC supply or an AC supply of frequency 50-60 Hz and having nearly the same RMS voltage as the DC source.
- When the motor is operated on DC, the current is limited by resistance only.
- But in AC operation, the current is opposed by impedance which is built up of resistive and reactive components.
- During AC operation of the universal motor, the inductive reactance of the armature and field windings opposes the current.
- In effect, a reactance voltage is produced in both the armature and field windings, consuming some of the applied voltage.
**Consequently, the speed of an AC series motor is less than that of the identical DC series motor.**