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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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Devloped Torque _________ rotor flux (∅𝟐) and __________ Rotor PF
Inversely Propositional & Directly Propositional
Inversely Propositional & Directly Propositional
Directly Propositional & Directly Propositional
Directly Square Propositional & Inversely Square Propositional
Inversely Propositional & Directly Propositional
The correct answer is B, as the developed torque is inversely proportional to rotor flux (∅₂) and directly proportional to rotor power factor (PF). This reflects how torque production in induction motors is affected by these parameters.
The correct answer is B, as the developed torque is inversely proportional to rotor flux (∅₂) and directly proportional to rotor power factor (PF). This reflects how torque production in induction motors is affected by these parameters.
T∝Φ21 — developed torque is inversely proportional to rotor flux
T∝PF — developed torque is directly proportional to rotor power factor
In induction motors, as the rotor flux increases, it leads to higher slip, resulting in reduced torque. Conversely, when the rotor power factor increases, it indicates better performance and higher torque output because of the better use of input power.
Higher rotor flux results in reduced developed torque due to increased slip.
Improved rotor power factor enhances the developed torque by optimizing power delivery.
Improves motor efficiency
Enhances performance under varying load conditions
High rotor flux can lead to excessive heating
Low power factor may indicate inefficiencies
Industrial motors requiring efficient operation
Pumps and fans where torque characteristics matter
Standard value for rotor flux depends on motor design and specifications.
Option A is incorrect because developed torque does not have a direct relationship with rotor flux.
B is correct — it accurately describes the relationship between developed torque, rotor flux, and rotor power factor.
Remember the inverse relationship between torque and rotor flux when studying motor characteristics.