In V/f control of an induction motor, the ratio V/f is kept constant to:

Option 1: Maintain constant torque

Option 2: Reduce rotor losses

Option 3: Increase slip

Option 4: Avoid hunting

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Correct Option: 1

Explanation

Approximate torque equation: ( T \propto \frac{V^2}{f} ). Keeping V/f constant ensures constant torque over the speed range.