The induction tag has no wiki summary.
5
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138 views
Can an induction coil heat two layers of metal?
Imagine we have an induction coil which is strong enough to heat a sheet of metal. We can put a sheet of ferromagnetic metal close to the coil at distance $h_1$, and it gets heated to temperature ...
5
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1answer
134 views
Why doe we not get a shock on induction cooker?
In induction cooking, eddy currents in cook-pot cause heat to be produced. But why do we not get a shock?
Also, why is it that current is converted to heat while it has a good conductor(say, steel) ...
3
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1answer
99 views
Is it possible to get energy from electrical wire using induction?
Pardon me if this is a stupid question but my physics courses are from a long long time ago and I was a teenager back then. ;)
Electricity in a wire generates electromagnetism, right?
Would it be ...
3
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3answers
216 views
What is the current through the lamp?
We have the following circuit:
A neon lamp and a inductor are connected in parallel to a battery of 1.5 $V$. The inductor has a 1000 loops, a length of $5.0 cm$, an area of $12cm^2$ and a ...
3
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3answers
183 views
Induction cooker + superconductive pot
What will happen if I put a super-conductive object on an induction cooker, and turn the cooker on?
2
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2answers
155 views
locality vs non-locality
Suppose we have a circular loop of wire, and we put a long perfect solenoid inside it which is connected to an AC voltage source so that the magnetic field inside it starts to vary by time, does this ...
2
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2answers
77 views
What is the maximum power available from a magnetic field?
I just want to validate something I inferred from studying Griffiths (1999).
The instantaneous magnetic field $\vec{b}(t)$ at a distance $r$ from a long infinite conductor carrying a current $i(t)$ ...
2
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1answer
31 views
Electric current streamlines in induction cooking vessel
I am looking for a plot of the typical streamlines of the electric induced currents ("eddy currents") in a induction cooking vessel.
How can one theoretically predict the streamlines? How is it ...
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2answers
115 views
What will happen if we place salt water on a induction cooker?
As we know that induction cooker works on the principal of induction of current in a conducting plate. So I just wanted to know what will happen if we place salt water in a plastic container on the ...
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2answers
285 views
Proving the consistency of Faraday's law of electromagnetic induction
Here is a question which frequently occurs on my school exam paper:
"Prove that Faraday's law of electromagnetic induction is consistent with the law of principle of conservation of energy." What ...
1
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1answer
60 views
Electrostatic induction
Is this a correct definition of electrostatic induction, The production of opposite charges on a neutral body when a charged body is brought near to it? I think it's not the production but ...
1
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1answer
177 views
Basic magnet through a copper coil experiment - What if poles were rotated 90 degress
I was wondering what voltage or current, if any, would be produced if the basic magnet through a copper coil experiment had the poles rotated 90 degrees so north and south faced the top/bottom of the ...
1
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1answer
92 views
Does special relativity unify the two phenomena at the base of Faraday's flux law (was Feynman wrong in this case)?
Consider Faraday's flux law for the EMF generated in a conductor loop:
$$ \varepsilon = - \frac{d \phi}{dt},$$
where $\varepsilon$ is the EMF, and $\phi$ is the magnetic flux through the loop.
...
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2answers
50 views
How does a force on electrons produce a force on a metal plate
In a paper from Cadwell Magnetic damping: Analysis of an eddy current brake using an airtrack about eddy current brakes the author explains the effect qualitatively as follows:
When a ...
0
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1answer
77 views
measuring electromagnetic induction
There is a famous law which says that a potential difference is produced across a conductor when it is exposed to a varying MF. But, how do you measure it to prove? It is quite practical.
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2answers
79 views
What would result in a transformer that has its secondary wires disconnected from any circuit?
I am studying magnetism and I am curious as to what happens in a transformer that has its secondary output wires connected through a circuit versus one that doesn't.
My main questions (in the case of ...
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0answers
25 views
Magnetic Field on a particle between two Helmholtz Coils
Given a Helmholtz coil of radius $R$ and with a current $I$, and assuming the coil is a circle centered at the origin in the $xy$-plane, what is the magnetic field on a particle at the point $(a, b, ...
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37 views
Using utensils having small bottom on induction cooktop [closed]
I have a pressure cooker (Which has label from manufacturer that it is induction compatible). When I use this pressure cooker on induction cook-top it does not detect it most probably because it has ...
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0answers
28 views
Why are induction cookers flat topped? [closed]
Why are Induction Cookers flat topped? Why can't they be curved?
0
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1answer
44 views
Magnetic induction in solenoid
I found an equation in theory about magnetic induction in a solenoid: $B_s=\mu_0 I n$. It should be magnetic induction for infinite length solenoid. I wonder if this is anyhow useful. Where can this ...
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32 views
Inductors and Current in Circuit [closed]
I was having trouble in my AP Physics class. I have a test tomorrow and for some reason, even after reading the book, I can't answer these practice questions. Can anyone please tell me how to do them? ...
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127 views
What is the current induced in a straight wire when a magnetic field is turned from on to off?
Consider a straight wire which runs along the y-axis. A B-field exists which is uniform and only in the x-direction:
$$\vec{B}=(B(t),0,0)$$
The B-field at time $t_0$ is 'switched off' in ...
