Correct option is C
An alternating current (AC) series motor, also known as a universal motor, can run on both AC and DC:
Explanation:
Universal motor: A universal motor is a commutated series-wound motor that can run on either AC or DC power. It has a stator that uses an electromagnet to create a magnetic field. Universal motors are often used in small home appliances and hand power tools.
Performance: When a DC series motor is designed for DC operation but runs on AC, it can experience a number of drawbacks, including:
. Low efficiency due to hysteresis and eddy current losses
. Low power factor due to the large reactance of the field and the armature windings
. Excessive sparking at the brushes
