Tagged Questions
0
votes
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 ...
1
vote
0answers
24 views
Does a flame produce free electrons? [duplicate]
Possible Duplicate:
Does Fire Conduct Electricity? Why?
Is fire plasma?
Does a flame produce free electrons ? Or is the answer sometimes depending on the chemicals ? Does the answer depend ...
5
votes
1answer
137 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 ...
1
vote
1answer
58 views
Could we really charge metal plates using microwaves?
While skimming through Dielectric heating, I read that they use microwaves to charge the plates. How do they do that?
3
votes
1answer
769 views
Why is the lid of the cookware kept on induction cooker not hot?
Induction cookware cooks food by inducing an electro magnetic field in the ferro-magnetic cookware. Since iron offers a lot of resistance to the current, the current is converted into heat in the ...
1
vote
1answer
366 views
Understanding the Seebeck effect
Thermoelectricity is, as I understand it, the difference in voltage between the hot and cold ends of two dissimilar materials. If two materials are connected at two different junctions, the hot ...
2
votes
4answers
1k views
Can heat be transfered via magnetic field in a vacuum?
Say you want to store hot coffee in a container surrounded by a vacuum. To remove all sources of conductive energy loss the container is suspended in the vacuum by a magnetic field and does not have a ...
3
votes
4answers
1k views
Why does evenly heating soup with a microwave take so long?
My anecdotal observations (which could be incorrect, they're totally unscientific) indicate that it takes almost as long to evenly heat a big bowl of soup in a microwave as it does to heat it on the ...
