All Questions
38
questions
1
vote
0
answers
38
views
EMF developed in a varying magnetic field
Let's say there's a cylindrical varying magnetic field (varying at a constant rate) and I have a conducting body, let's say a rod placed in a plane perpendicular to magnetic field. I am having a ...
0
votes
1
answer
329
views
Permanent magnet with residual magnetization and Induced EMF
Let's consider a permanent magnet and a coil. No current flows through the coil. Can the permanent magnet induce an EMF into the coil (and thus an induced current)? Why?
Many thanks.
- 1,133
0
votes
1
answer
557
views
Electromagnetic induction in varying current
I know about Faraday's Law and how it states that an electric field will be produced if it will sense a change in magnetic flux that there are other sources of electric field except for an electric ...
- 99
1
vote
0
answers
2k
views
Inductance of two parallel cylindrical wires
Let's say that I've got two wires, one with radius $a$ and the other with radius $b$, $h$ apart, and I want to calculate the self inductance per unit lenght of this system, which is defined as the "...
- 789
0
votes
2
answers
2k
views
Misunderstanding of Lenz's law
The increasing current (and hence increasing flux and changing magnetic field) in the outer solenoid induce a current in the inner solenoid.
The current in the outer solenoid produces a magnetic ...
2
votes
2
answers
109
views
Inductor circuit
Consider a inductor circuit with an inductor connected to a DC battery and a switch. Initially the switch is open.
At time $t=0$ the switch is closed. What will happen to the inductor just after the ...
- 21
0
votes
2
answers
491
views
Magnetic field by a solenoid?
I am really not able to understand why is it that the current,while finding the magnetic field in the solenoid (ideal one), is not $I$ the current flowing throught the solenoid but $nI$, where $n$ is ...
- 897
8
votes
1
answer
10k
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) ...
- 225