physics projects

Thread Starter

wire

Joined Dec 18, 2011
13
Guys........I need a suggestion on physics projects (modals) related to .....capacitors , electromagnetic waves , light or resistors which can be displaced for BSE level but not too complicated as it is not major subject .
 

Thread Starter

wire

Joined Dec 18, 2011
13
The reference site was quite useful.The problem is that I am running short of time I need I project which can be displayed .....the topic I have studied are about capacitors,resistance,electricity,electromagnetic waves....circuits....All experiment I have seen I think they can not be tagged as projects......I need some proper but simple to implement project....
 

Sparky49

Joined Jul 16, 2011
822
You could investigate the construction and use of a simple time domain reflectometer.

I'll breifly explain what one is.

If you have a long length of buried cable (we're talking into the hundreds of meters long) which transmits data, you're in a spot of bother if it becomes damaged because of a short circuit, a cut, water etc...

You can't really justify digging up hundreds of meter of cable to find one fault, especially if it's in a residential area - think of all the complaints!:D

Instead you can exploit an interesting effect - that some energy will reflect from the damaged part of the cable, back towards the emitter!

This is what a time domain reflectometer (TDR) relies upon. At a basic level, it emits a large pulse of energy and waits for the reflection. You can time how long it takes for the pulse to go out and be reflected. With a bit of maths you can figure out where the damage is (to within a few meters!).

Resistance and capacitance are covered nicely as both resistors and capacitors are used to generate the out going pulses - and can be used to vary the length of the pulse.

Electricity is covered because - well - it runs off the stuff. Also, it ties in nicely with electricity in communications.

If this suits you, I can provide a website with some more infomation to get you started.

But you'll have to say please first!:)

Sparky
 

studiot

Joined Nov 9, 2007
5,003
What's BSE level please, I thought BSE was mad cow disease :eek:


You could investigate the construction and use of a simple time domain reflectometer.
There were a couple of good articles on this in a recent Elektor magazine including a practical project to follow.

Metal detectors, cable detectors etc are also good for practical projects.

Also visit this site

www.physicsforums.com

go well
 

Thread Starter

wire

Joined Dec 18, 2011
13
please ..... but i hope it will not be too complicated......as I think it will be.Would I be able to implement it.
I was thinking to make a working model. ...using vegetable to generate electricity to lit a led to make traffic light but I think your idea will be a better choice.
 

Thread Starter

wire

Joined Dec 18, 2011
13
I can implement the circuit which I have seen .It involved oscilloscope and source generator. I have to study alot for understanding its working.Physics is not my major subject.I am doing software engineering.I think now you would be understand that I have only surface knowledge of physics.The site is

http://www.epanorama.net/circuits/tdr.html
 

Sparky49

Joined Jul 16, 2011
822
The time domain reflectometer is probably simpler than the traffic lights circuit.

Vegetable batteries are such a - cliche. They've been done and done and done and done and done and....

Here's the link,

http://www.free-circuit.com/time-domain-reflectometertdr-circuit-with-74ac14/

Also, as studiot says, there are a few recent articles from elektor, which can be bought for virtually nothing. Regardless of their cost - they'll help you produce a brilliant project.

Here's the link to the first article, discussing the whole idea of time domain reflectomy:

http://www.elektor.com/magazines/2011/october/time-domain-reflectometry.1948603.lynkx

And here's another about making the actual TDR:
http://www.elektor.com/magazines/2011/december/turn-your-oscilloscope-into-a-reflectometer.1992172.lynkx

Again, I really recommend buying these two articles - they'll help you make a project your teachers goes 'wow'!:eek:

I hope there's enough links to help you - "that's the power of please kids!"

Sparky

P.S. If you want any more help, don't be afraid to ask!

P.P.S. I guess you are taking a GSE?
 

Sparky49

Joined Jul 16, 2011
822
I can implement the circuit which I have seen .It involved oscilloscope and source generator. I have to study alot for understanding its working.Physics is not my major subject.I am doing software engineering.I think now you would be understand that I have only surface knowledge of physics.The site is

http://www.epanorama.net/circuits/tdr.html
Good website - I was looking for that one! :)

Have a look at the Elektor articles - what part of the world are you from?
 
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