HSC Stuff > HSC Physics
Motors and Generators Trial question
blasonduo:
Hello!
This question has been buzzing around my school with no definite answer (as we don't have solutions)
What is the most suitable answer?
jakesilove:
--- Quote from: blasonduo on July 17, 2017, 06:33:52 pm ---Hello!
This question has been buzzing around my school with no definite answer (as we don't have solutions)
What is the most suitable answer?
--- End quote ---
I believe the answer would be an AC induction motor!
Remember that induction motors work by rotating the polarity of the electromagnets in the cage surrounding the rotor. As the rotor moves to 'align' with the external magnetic field, the field switches, causing the rotor to continue to chase after it. Therefore, the current is actually passing through the electromagnet, not the rotor.
blasonduo:
--- Quote from: jakesilove on July 17, 2017, 06:58:52 pm ---I believe the answer would be an AC induction motor!
Remember that induction motors work by rotating the polarity of the electromagnets in the cage surrounding the rotor. As the rotor moves to 'align' with the external magnetic field, the field switches, causing the rotor to continue to chase after it. Therefore, the current is actually passing through the electromagnet, not the rotor.
--- End quote ---
Thanks, but how do I know that it cannot be a generator?
pikachu975:
--- Quote from: blasonduo on July 17, 2017, 07:12:11 pm ---Thanks, but how do I know that it cannot be a generator?
--- End quote ---
The rotor is connected through split ring commutator or split rings but it says it's not connected
winstondarmawan:
Generators have a power source, it's just not electrical.
Also the question says "most likely", so I suppose they are asking you to choose the most correct answer which would be A.
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