Why is current so small in size?

pallavi agarwal

why is current so small in size?

The_Big_K

Quote:

Originally Posted by pallavi agarwal

why is current so small in size?

Didn't get your question.

Probable answer could be: Because its made up of electrons.

ash

Haha, he meant why current values are always in the milli range and such. I think..

gohm

If current was any larger it wouldn't fit through the tiny wires...

ok, so that was a lame joke.

Can you explain your question a little bit more?

xheavenlyx

Well, we have been thought current is some'thing'. Current is just flow of energy (not even electrons, they dont travel from one end to the other you know).

====offtopic===

Gohm:

1. I am very interested in what you said about discussing antique inventions and discoveries of Da Vinci and Wright bro's. I have a book on da vinci, and wow, he was a genius of his time.

2. I wish you could contribute on CEbot

vissin

Current Cur"rent, n. [Cf. F. courant. See Current, a. ]
[1913 Webster]
1. A flowing or passing; onward motion. Hence: A body of
fluid moving continuously in a certain direction; a
stream; esp., the swiftest part of it; as, a current of
water or of air; that which resembles a stream in motion;
as, a current of electricity.
[1913 Webster]

So my dear friend, you must first mention what you mean by current? (Even if, we may safely assume here that you're speaking of electric current).

Now speaking of electric current, thanks to nano watt technology, modern mico-electronics work with as little as a few nano Amps. But then look at the transmission cables and you'll find that some of them carry kilo Amps of current. So before commenting on size of current we must specify the circuit through which current is flowing.

The unit of current being Ampere is approximately equivalent to 6.24150948×1018 elementary charges, such as electrons, moving past a boundary in one second.

sauravgoswami

Hey current ranges changes acording to application,transmission lines carry high-current and so on.......mostly in electronic we use low current

arunbasillal

The question is not clear enough. And if he meant that usually Current is in mA range, he is wrong. Ok. current in electronics is in mA range. But when it comes to transmision , its in the range of 100 A and above depending on load. Thats why we use current Transformers. If all current was in mA range, then we wouldnt need CT's

Jeanius

Quote:

Originally Posted by xheavenlyx

Well, we have been thought current is some'thing'. Current is just flow of energy (not even electrons, they dont travel from one end to the other you know).

It isn't? I thought that current flow was the passage of electrons from differing potentials. Wouldn't there be current flowing between the two ends of a chemical cell?

The_Big_K

@xheavenlyx - Hey, electrons DO travel, don't they?

That's what I've been taught!