Three Phase Induction Motors MCQs with Explanatory Answers
1. If the frequency of 3-phase supply to the stator of 3-phase induction motor is increased, then synchronous speed is ________?
- Increased
- Decreased
- Remain unchanged
- None of the above
Show Explanatory Answer
Answer: 1. Increased
Explanation: As we know that; f = NSP/ 120
It is clear that f ∝ NS i.e., frequency (f) is directly proportional to the Synchronous speed (NS).
In more clear words, when frequency increases, Speed also increases.
Explanation: As we know that; f = NSP/ 120
It is clear that f ∝ NS i.e., frequency (f) is directly proportional to the Synchronous speed (NS).
In more clear words, when frequency increases, Speed also increases.
Related Articles
-
Why Do Doorbells Use Low Voltage of 12V-24V AC Instead of DC?
-
Why Does an Electric Tester Not Work in DC Circuits?
-
Why Do The Positive And Negative Wires Spark When Touched?
-
What are the Cuts on the Rotor of Motor’s Armature?
-
Why Do Wind Turbines Have 3 Blades Instead of 2 or 5?
-
Difference Between Edge Triggering and Level Triggering