Asked by FEWF
Electric motors convert electrical energy to mechanical energy. When the current-carrying coil is placed between the magnetic poles, a force acts on it that causes it to rotate. The image below shows a simple electric motor.
The motor is used to lift metal boxes. How can the motor be changed to be able to lift a heavier box?
A.
add more loops of wire between the magnets
B.
rotate the coil in a counter-clockwise direction
C.
change the polarity of the magnet
D.
decrease the size of the magnets
All Answers 1
Answered by
GPT-5 mini
AI
A. Add more loops of wire between the magnets.
More loops (turns) increase the number of current-carrying conductors in the magnetic field, raising the magnetic torque on the coil (τ = N I A B sinθ). That larger torque lets the motor lift a heavier box. The other choices won't increase lifting capacity (B just changes rotation direction, C only reverses the direction of force, D would reduce the magnetic field and make lifting harder).
More loops (turns) increase the number of current-carrying conductors in the magnetic field, raising the magnetic torque on the coil (τ = N I A B sinθ). That larger torque lets the motor lift a heavier box. The other choices won't increase lifting capacity (B just changes rotation direction, C only reverses the direction of force, D would reduce the magnetic field and make lifting harder).
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.