kirchoffs law

[Sunil]

hello...my name is sunil. I am currently doing my first year
Electronics and communication engineering in chennai. We had electric
circuits lab the other day and our prof told us that we had to perform
an experiment to verify kirchoff's theorems (both of them). Though i
know the theory, i am unable to imagine an experiment. The prof also
told us that we had to do this experiment on a breadboard. Can someone
help me??

 

[Mikkel Lund]

Sunil skrev:

hello...my name is sunil. I am currently doing my first year
Electronics and communication engineering in chennai. We had electric
circuits lab the other day and our prof told us that we had to perform
an experiment to verify kirchoff's theorems (both of them). Though i
know the theory, i am unable to imagine an experiment. The prof also
told us that we had to do this experiment on a breadboard. Can someone
help me??

Then you don't know it ;-) Imagine a voltage reference and a number of
resistors in series.
If no, see:
http://phoenix.phys.clemson.edu/labs/223/ohmslaw/index.html

 

[John Popelish]

hello...my name is sunil. I am currently doing my first year
Electronics and communication engineering in chennai. We had electric
circuits lab the other day and our prof told us that we had to perform
an experiment to verify kirchoff's theorems (both of them). Though i
know the theory, i am unable to imagine an experiment. The prof also
told us that we had to do this experiment on a breadboard. Can someone
help me??

Kirchoff's voltage law says that the sum of all voltages
around a loop must add up to zero. Connect some resistors
in series around a loop that includes a voltage source (a 9
volt battery, perhaps), measure the voltage across each
resistor and the source, keeping careful track of the
polarity relative to the direction you go around the loop,
and add them up and see how close to zero they total.

Kirchoff's current law says that the sum of all currents
entering a single node add up to zero. So you arrange for
some currents to arrive at a single node, measure all of
those currents by inserting a current meter in series with
each, using the same polarity for all (say, positive meter
lead toward the node in question) and add the currents up
and see how close to zero the total is.

Both these experiments may show a small non zero total,
because of measurement tolerances and the the fact that you
have not corrected for the way the measurements change the
situation. But the results should be pretty close to zero.
Your analysis of the experiment should delve into these
effects.

 

[PeteS]

Kirchoff's voltage law says that the sum of all voltages around a loop
must add up to zero. Connect some resistors in series around a loop
that includes a voltage source (a 9 volt battery, perhaps), measure the
voltage across each resistor and the source, keeping careful track of
the polarity relative to the direction you go around the loop, and add
them up and see how close to zero they total.

Kirchoff's current law says that the sum of all currents entering a
single node add up to zero. So you arrange for some currents to arrive
at a single node, measure all of those currents by inserting a current
meter in series with each, using the same polarity for all (say,
positive meter lead toward the node in question) and add the currents up
and see how close to zero the total is.

Both these experiments may show a small non zero total, because of
measurement tolerances and the the fact that you have not corrected for
the way the measurements change the situation. But the results should
be pretty close to zero. Your analysis of the experiment should delve
into these effects.

If the OP can access a.b.s.e I might put a schematic of a test circuit;
it's up to the OP to do the measurement, of course.

Having taught, I understand the gap between what one hears from a
lecturer and actually constructing something to test it - besides, it's
s.e.b and New Year to boot

Cheers

PeteS

 

[PeteS]

If the OP can access a.b.s.e I might put a schematic of a test circuit;
it's up to the OP to do the measurement, of course.

Having taught, I understand the gap between what one hears from a
lecturer and actually constructing something to test it - besides, it's
s.e.b and New Year to boot

Cheers

PeteS

Posted to a.b.s.e

 

[Rich Grise]

Nah - googlegroups.

Thanks,
Rich

 

[Charles Schuler]

hello...my name is sunil. I am currently doing my first year
Electronics and communication engineering in chennai. We had electric
circuits lab the other day and our prof told us that we had to perform
an experiment to verify kirchoff's theorems (both of them). Though i
know the theory, i am unable to imagine an experiment. The prof also
told us that we had to do this experiment on a breadboard. Can someone
help me??

Kirchhoff's voltage law ... a series circuit should do it (measure all the
voltage rises and drops and they should sum to zero).

Kirchhoff's current law ... a parallel circuit should do it (measure all
the node currents and they should sum to zero).

Or, get fancy and use an unbalanced bridge circuit to demonstrate both laws
(lots of loops and nodes to play with). Your Prof will be impressed!

 

[PeteS]

Nah - googlegroups.

Thanks,
Rich

Hey - I tried

Cheers

PeteS