All Questions
34
questions
3
votes
2
answers
10k
views
Self-induction in a circular coil
There's a formula for self inductance: $$ L=\frac{n\Phi}{i}$$ where n is the number of loops.
But the book also says self inductance is directly proportional to $ n^2 $
I totally agree with the ...
- 366
1
vote
1
answer
214
views
What does an induced emf do to a loop of varying current?
I know that the magnetic flux through a loop in space is proportional to the current such that $\Phi=LI$. Therefore a change in magnetic flux will produce an emf, so $\mathscr{E}=-L\dfrac{dI}{dt}$. ...
- 518
0
votes
4
answers
1k
views
Spherical magnet inside a solenoid
When passing a bar magnet through a long solenoid why is it that the induced emf when the magnet is in the middle of the solenoid is zero? And if a spherical magnet is put inside the solenoid, will ...
- 27
6
votes
2
answers
7k
views
How to calculate required current and specifications for a "wet coil" to generate x Tesla of magnetic field?
A water management project requires a "wet coil" (coil will be submerged in aqueous media) designed to generate a steady-state electromagnetic field of adjustable magnetic magnetic flux density at the ...
- 163