All Questions
39
questions
1
vote
1
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297
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How does one calculate or even approximate the force observed by a magnet as its dropped inside of a diamagnetic cylinder?
How does one calculate or even approximate the force observed by a magnet as its dropped inside of a diamagnetic cylinder?
Wikipedia and Google does not provide much information on this topic. ...
- 2,107
2
votes
1
answer
2k
views
The force on the northern hemisphere
I am reading Griffiths' Introduction to Electrodynamics.
On page 364, example 8.2 (4th edition), he calculates the force on the northern hemisphere of a ball with total charge $Q$ spread uniformly.
...
- 438
0
votes
3
answers
148
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Traveling to Mars in 24 Days
I am trying to calculate an electromagnetic rail launch from the Moon but I need to know if humans can survive the launch. Please see the specs below.
150 miles of track
Proposed final launch speed ...
- 13
3
votes
1
answer
3k
views
Force of a solenoid on a ferromagnetic material
As I was trying to find an answer to another problem, I was informed that the equation I was using would not work.
The equation I was using was
$$F = (NI)^2\mu_0\frac{\text{Area}}{2g^2}$$
If this ...
- 1,340
0
votes
2
answers
610
views
Electrical force between two objects
I tried to solve the following problem:
There are 2 objects . The object m1 with charge q and the object m2 with charge q.(same charge).The object m2 is connected with a rope to the ceiling.
at the ...
- 397
0
votes
1
answer
239
views
Want to achieve maximum magnetic force & find out the max point [closed]
Hi Sir/ Madam
Want to achieve maximum magnetic force & find out the max point for this setting, want to know
is the strongest magnetic force must in the 'dot' area ( middle poin of setting )
...
- 11
1
vote
3
answers
1k
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So do I use this Lorentz's law or which law do I use?
I have difficulty understanding exercise 24 in this document:
Two parallel wires I and II that are near each other carry currents i and 3i both in the same direction. Compare the forces that the two ...
- 735
3
votes
1
answer
258
views
The force exerted by a ~10 Tesla magnet on a C13 isotope?
How much force would a ~10 Tesla magnet exert on a weakly magnetic C13 isotope? If I made a molecule of diamond with $N$ C13 atoms, how large would $N$ need to be for me to pull on it with something ...
- 31
13
votes
9
answers
57k
views
What's the core difference between the electric and magnetic forces?
I require only a simple answer. One sentence is enough... (It's for high school physics)
- 245