Re: HIGH SCHOOL Electricity

Albert wrote:
Hi,

I'm currently at high school.
We were told to set up simple circuits connecting one battery to a
light globe and making light appear. Then there's the question: Did it
matter where you inserted the ammeter into the circuit. Explain.

What is a typical resistance of an ammeter?
http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/ohmlaw.html#c3




Well, it's obvious that it's no but I'm having trouble expressing a
reasonable response in scientific terms. Is this okay?

Think about all the resistance in the current loop. Insert an ammeter.
Did you significantly change the total resistance?


No, because there are always the same numbe rof electrons moving
through the ammeter each second.

--
The teacher said he'd come back to this question but he hasn't and
tomorrow (relative to this time of posting) he wants to collect up our
notes booklet.

5. What is the difference between the potential difference (PD) of a
12V battery and the PD of a 12V bike dynamo?
From experiments we found out ourselves that the battery uses AC and
the dynamo uses DC. The teacher said that there was more to this and
that he'd come back. Could you HELP me develop an explanation for this
please?

Thanks
Albert


Electric Circuits
http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/ecircon.html

Kirchhoff's circuit laws
http://en.wikipedia.org/wiki/Kirchhoff's_circuit_laws
.

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