3
votes
Why electric field increase near the cable connected in AC 220V socket even current is zero?
The electric field depends on the potential difference (voltage) between the wires in the cable, not on the current going through the wires. The electric field will be strongest inside the cable, ...
- 36k
3
votes
Accepted
Why the $T_1$ recovery & $T_2$ decay are independent?
The first thing you have to note is that: no, the transverse $M_{xy}$ component does not exchange energy with the longitudinal $M_z$ component for the magnetization $\vec{M}$ to return to equilibrium. ...
- 649
3
votes
Why the $T_1$ recovery & $T_2$ decay are independent?
They are indeed independent. I don't know what animations you're referring to, but this independence is clear from their defining equations, which do not depend on each other:
$M_z(t)=M_z(0)(1-e^{-t/...
- 113
1
vote
Accepted
Permittivity real and imaginary parts with similar value possible?
Since the right side of the second figure is not clear because of the inappropriate scale, I will only analyze the left half of the frequency range. Obviously, the imaginary part of the permittivity $\...
- 91
1
vote
Accepted
Magnetic field for a cylindrical shell in which current flows
If you construct a circular loop around the cylindrical axis and argue by symmetry that the magnitude of the field is constant on that loop then Ampere's law can only tell you about the $\phi$ ...
- 133k
1
vote
Comparing Electric Potential Energy of two Charges
In the case that A and B both have the same positive charge: remember that potential energy associated with a position (it is not defined as something that requires two positions e.g. A and A') is the ...
- 1,447
1
vote
How do you convert from Townsend Unit $\rm Td$ to $\rm kV/(cm bar)$?
An educated guess by an insider.
Everything rob says is correct and everything calculated in the question is correct.
I have been making calculations with E/N values and I also have to convert from V/...
- 6,958
1
vote
Most generic form of refractive index tensors
Symmetry: In non-magnetic media, the real part of the refractive index tensor is typically symmetric due to energy conservation principles. This symmetry is related to the reciprocity theorem in ...
- 21
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