2007-03-26 22:38:30 · 8 answers · asked by "nee" 1 in Science & Mathematics ➔ Physics
There are amp meter that can read in Nano amp range.
The regular ($3.00 radio sack) ones have a dial and scales, you set the dial to scales or range and read the scale. Normally you take reading on larger scale and then zero in to fine scale.
2007-03-27 09:27:12 · answer #1 · answered by minootoo 7 · 0⤊ 0⤋
It depends on how the ammeter has been calibrated and how sensitive it is.
Some professional digital ammeters can measure minute currents, less than 1/100000000th of an amp (a nano-ampere is 1 x 10^-9 Amps), some can even go down to pico-amperes (1 x 10^-12 Amps)
See link....
http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=14692
2007-03-26 23:06:23 · answer #2 · answered by Doctor Q 6 · 0⤊ 0⤋
well, it all depends,
few ammeters can have their least count as 1A while others could have as low as 1*10^-6!
it all varies from ammeter to ammeter
if you want one for the school lab then 0.1A will do. and if you want it for, say some scientific research, then the lower the least count, the better it is!
2007-03-26 23:00:59 · answer #3 · answered by new_einstein 2 · 0⤊ 0⤋
It depends upon the ammeter. It can read micro amps to one amps.
2007-03-27 10:15:12 · answer #4 · answered by J.L. S 3 · 0⤊ 0⤋
A good quality unit can read down into the micro-amps.
2007-03-26 22:49:39 · answer #5 · answered by Billy Butthead 7 · 0⤊ 0⤋
minimum reading that an ammeter can read in microamperes.....but in instrument it may read .01amperes...
2007-03-26 23:16:49 · answer #6 · answered by PearL 4 · 0⤊ 0⤋
a Radio Shack or a Hewlett Packard?
2007-03-26 22:41:18 · answer #7 · answered by 1000 Man Embassy 5 · 0⤊ 0⤋
.01 ampere
2007-03-26 22:55:17 · answer #8 · answered by Neeraja Singh 3 · 0⤊ 0⤋