network profile
| bio | website | |
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| location | ||
| age | ||
| visits | member for | 11 months |
| seen | Jan 8 at 11:40 | |
| stats | profile views | 3 |
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Jan 2 |
comment |
What happens when we connect a metal wire between the 2 poles of a battery? I was looking for a clear explanation of how exactly electric fields appear along a circuit connected to a battery. This explanation is exactly what I was looking for. |
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Aug 10 |
awarded | Benefactor |
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Aug 10 |
comment |
Rotational speed of a coil in a uniform magnetic field at equilibrium Thank you for your help. This solution makes sense. As you said, this question seems to be poorly constructed, giving rise to many interpretation doubts. Therefore, many assumptions which are not stated in the question were needed in order to reach a solution that is close to the book's answer. |
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Aug 10 |
comment |
Rotational speed of a coil in a uniform magnetic field at equilibrium Thank you for the answer. But I have another question: when you wrote that, if the motor has a commutator, $\langle \sin \theta \rangle \not = 0$, did you mean to say that only non-negative values of sine will be used, because torque doesn't change direction? |
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Aug 10 |
revised |
Rotational speed of a coil in a uniform magnetic field at equilibrium added 539 characters in body |
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Aug 9 |
comment |
Rotational speed of a coil in a uniform magnetic field at equilibrium @kleingordon: OK, I get it now. The only point that I am still missing is why exactly $\sin\theta$ has to equal $1$ for this to be true. |
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Aug 8 |
comment |
Rotational speed of a coil in a uniform magnetic field at equilibrium Thank you for the reply. So, this equilibrium that the question is referring to is an instantaneous equilibrium, like @kleingordon said, rather than a permanent state of equilibrium? When you wrote $NAB\omega\sin\theta$ becomes zero, did you mean to say that $24 - NAB\omega\sin\theta$ becomes zero? Actually I think that I don't still quite understand how this makes the torque become zero. |
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Aug 8 |
comment |
Rotational speed of a coil in a uniform magnetic field at equilibrium Thank you for the answer. But I don't quite see why $\sin \theta$ would necessarily stay equal to 1 in this case, because the motor continues to rotate. |
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Aug 5 |
awarded | Promoter |
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Jul 25 |
awarded | Student |
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Jul 23 |
revised |
Rotational speed of a coil in a uniform magnetic field at equilibrium deleted 2 characters in body |
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Jul 19 |
revised |
Rotational speed of a coil in a uniform magnetic field at equilibrium added 6 characters in body |
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Jul 18 |
awarded | Tumbleweed |
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Jul 13 |
awarded | Supporter |
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Jul 12 |
awarded | Editor |
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Jul 11 |
revised |
Rotational speed of a coil in a uniform magnetic field at equilibrium added 22 characters in body |
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Jul 11 |
asked | Rotational speed of a coil in a uniform magnetic field at equilibrium |
