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Dale's latest activity
Dale
replied to the thread
I
How is Potential Difference Created across a Resistor?
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Yes, and even when it is a deficit of electrons in a wire, the resulting positive charge is still a free charge.
May 18, 2024
Dale
replied to the thread
I
How is Potential Difference Created across a Resistor?
.
It is established during the initial dynamic phase when ##\partial \rho /\partial t \ne 0##
May 18, 2024
Dale
reacted to
cianfa72's post
in the thread
I
How is Potential Difference Created across a Resistor?
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Ah ok so, wherever the conductivity changes through the wire, where the non-zero free charge density ##\rho## comes from (as you said...
May 18, 2024
Dale
replied to the thread
I
How is Potential Difference Created across a Resistor?
.
No. Bound charge is not simply a charge density that is not moving. Bound charge is the charge associated with polarization by ##\rho_b...
May 18, 2024
Dale
reacted to
Nugatory's post
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B
Falling into a black hole
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Looks like a whole bunch of other people got answers in while I was typing my response (so that is what we're all doing on Saturday...
May 18, 2024
Dale
replied to the thread
B
Falling into a black hole
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This isn’t true. Since the “if” is false none of the “then” applies. A “takes forever to cross” spacetime is different from an...
May 18, 2024
Dale
reacted to
cianfa72's post
in the thread
I
How is Potential Difference Created across a Resistor?
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Like
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In stationary conditions, however, the non-zero charge density ##\rho## inside the wires (wherever the conductivity change) is constant...
May 18, 2024
Dale
replied to the thread
I
How is Potential Difference Created across a Resistor?
.
Yes and yes
May 18, 2024
Dale
reacted to
PeterDonis's post
in the thread
B
Is velocity the reason for the time dilation effect?
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No, not "time dilation in general"--only "time dilation" by Rindler's definition. Which, as has already been said, is what we in this...
May 18, 2024
Dale
replied to the thread
I
How is Potential Difference Created across a Resistor?
.
The charge density inside the wires can be non-zero. In particular wherever the conductivity of the wires changes. The continuity...
May 17, 2024
Dale
reacted to
PeterDonis's post
in the thread
B
Is velocity the reason for the time dilation effect?
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Google turns up a number of papers by one E. Minguzzi which use the term, although it's not clear that their usage is the same as ours...
May 17, 2024
Dale
replied to the thread
B
Is velocity the reason for the time dilation effect?
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I like the term “differential aging” as it does clarify the invariant vs frame variant distinction. As far as I know, however, it is a...
May 17, 2024
Dale
reacted to
cianfa72's post
in the thread
B
Is velocity the reason for the time dilation effect?
with
Like
.
See also this thread Is time dilation a real effect?
May 17, 2024
Dale
replied to the thread
B
Is velocity the reason for the time dilation effect?
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Personally, I consider the word “real” to be a philosophical term which is best avoided altogether. (Except as part of the mathematical...
May 17, 2024
Dale
replied to the thread
Physics education is 60+ years out of date
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I was very clear about not rehashing the old stuff. This thread is closed.
May 16, 2024
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