The flux in a universal motor is proportional to armature current. If armature current is increased by 20%, torque will increase by approximately:

Option 1: 0.2

Option 2: 0.44

Option 3: 0.4

Option 4: 0.6

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Correct Option: 2

Explanation

Since Φ ∝ I and T ∝ ΦI, torque becomes proportional to I². Increasing current by 20% gives T = (1.2)² = 1.44, i.e., 44% increase.