Different forms of energy can be converted into electrical impulses through various simple experiments. Suggestions include using a flashlight or an iPod to demonstrate chemical energy conversion, employing a photocell to power an LED, or utilizing a bicycle tire-mounted generator for lighting. A thermocouple can also be used to convert heat into electricity. While the initial focus is on generating electricity, the same energy sources can power communication devices like radios and televisions, provided they meet the necessary wattage requirements. These methods illustrate the versatility of energy conversion in practical applications.
#1
nath_quam
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0
What would be an experiment i could prefrom to show how different forms of energy are converted into electrical impulses?? Simple ones
(chemical energy -> electrical something-or-nother -> something else)
#3
nath_quam
13
0
Thanks any other good ideas??
#4
Danger
Gold Member
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You could also use a photocell to run an LED, or take (if they still exist) a bicycle tire-mounted generator to run a light. That's how bicycle lights were powered when I was a kid. You might also be able to come up with a cheap thermocouple, which translates heat into electricity. Really, there are dozens of approaches.
#5
nath_quam
13
0
What is one specific to communication eg radios faxes and televisions
#6
Danger
Gold Member
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In that regard, I'd say that the options are still the same. Your question was regarding making electricity; what you use it for in the long run is irrelevant. Batteries, fuel cells, photovoltaic cells, mechanical generators, thermocouples or thermionic converters, beta-source generators... they'll all run communications devices of any kind as long as the produced wattage meets the requirements.
I'm thinking about the following problem. I have an electrified fluid with a constant charge density, Q, within the fluid. Will this necessarily yield a surface charge?
Would I have to compute it by looking at the displacement fields on either side of the interface? Would it change if the bulk charge within the fluid remains constant?
This is from Griffiths' Electrodynamics, 3rd edition, page 352.
I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##.
In matrix form, this tensor should look like this...
Please can anyone either:-
(1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges?
Or alternatively (2) point out where I have gone wrong in my method?
I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula.
Here is my method and results so far:-
This...