- #1
alexandria
- 168
- 2
Homework Statement
Homework Equations
no equations are required
The Attempt at a Solution
is this correct?
[/B]
Electromagnetism and the motor principle
- Thread starter alexandria
- Start date
AI Thread Summary
The discussion focuses on the motor principle in electromagnetism, specifically regarding the placement of a conductor between magnetic poles. It confirms that the field lines of the magnet are oriented from right to left, despite the conductor's low position. A suggestion is made to adjust the outer field lines of the conductor to fit better within the poles. The right-hand motor rule is highlighted as a method to determine the direction of force, current, and magnetic field. Overall, the conversation emphasizes the correct application of these principles in understanding electromagnetism.
no equations are required
is this correct?
[/B]
- #2
andrevdh
- 2,126
- 116
Yes, it seems to be correct.
The conductor is sitting a bit low between the poles, but one would assume that the field lines of the magnet would still be right to left.
Just one remark, maybe you should make the second outer field lines of the conductor smaller, that is a smaller circle which fits inside of the poles.
The right-hand motor rule is normally used to determine the direction of the force on the conductor: thumb - force, index finger - current, middle finger - magnetic field.
The conductor is sitting a bit low between the poles, but one would assume that the field lines of the magnet would still be right to left.
Just one remark, maybe you should make the second outer field lines of the conductor smaller, that is a smaller circle which fits inside of the poles.
The right-hand motor rule is normally used to determine the direction of the force on the conductor: thumb - force, index finger - current, middle finger - magnetic field.
- #3
alexandria
- 168
- 2
ok, thanks for the help 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19.
For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Let's declare that for the cylinder,
mass = M = 10 kg
Radius = R = 4 m
For the wall and the floor,
Friction coeff = ##\mu## = 0.5
For the hanging mass,
mass = m = 11 kg
First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on.
Force on the hanging mass
$$mg - T = ma$$
Force(Cylinder) on y
$$N_f + f_w - Mg = 0$$
Force(Cylinder) on x
$$T + f_f - N_w = Ma$$
There's also...
This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is
The second part of the problem is exactly why you get this affect.
And one more spoiler:
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