If the current drawn by a DC series motor is increased from 10 A to 12 A (neglect saturation), what is the increase in torque expressed as percentage of initial torque?
- A. 21%
- B. 25%
- C. 41%
- D. 44%
Answer: D. 44%
Explanation: In an unsaturated DC series motor, torque T ∝ Ia²; T2/T1 = (12/10)² = 1.44, representing a 44% increase in torque.