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 Opti…
Option 1: Maintain constant torque Option 2: Reduce rotor losses Option 3: Increase slip Opti…
Option 1: Rotor copper losses increase Option 2: Flux remains constant Option 3: Slip becomes…
Option 1: Mechanical losses Option 2: Stator copper losses Option 3: Rotor copper losses Opti…
Option 1: Rotor resistance = stator resistance Option 2: Rotor reactance = rotor resistance Op…
Option 1: No-load test & Efficiency test Option 2: Blocked rotor test & Load test Opti…
Option 1: 0.25 Option 2: 0.333 Option 3: 0.4 Option 4: 0.5 Correct Option: 4 Explanation Sp…
Option 1: 736 W Option 2: 800 W Option 3: 920 W Option 4: 1000 W Correct Option: 1 Explanat…
Option 1: 0.2 Option 2: 0.44 Option 3: 0.4 Option 4: 0.6 Correct Option: 2 Explanation Sinc…
Option 1: Only AC supply Option 2: Only DC supply Option 3: Both AC and DC supply Option 4: …
Option 1: DC motor Option 2: Universal motor Option 3: Repulsion motor Option 4: Induction m…
Option 1: Reduce power loss Option 2: Improve efficiency Option 3: Extend measuring instrumen…
Option 1: Equal impedance magnitude Option 2: Equal impedance angle Option 3: Impedance inver…
Option 1: Load current Option 2: Difference in efficiency Option 3: Difference in induced emf…
Option 1: 720 kVA Option 2: 450 kVA Option 3: 600 kVA Option 4: 750 kVA Correct Option: 1 E…
Option 1: Voltage ratio Option 2: Power factor Option 3: Percentage impedance Option 4: Core…
Option 1: Low starting torque Option 2: Complex design Option 3: High power loss in resistanc…
Option 1: Above base speed Option 2: Below base speed Option 3: Constant speed Option 4: Reg…
Option 1: Armature current increases Option 2: Flux decreases Option 3: Back EMF decreases Op…
Option 1: Only below rated speed Option 2: Only above rated speed Option 3: Constant speed Op…
Option 1: Flux only Option 2: Armature resistance only Option 3: Applied voltage only Option …