modified 10 years ago

123

00:45:31

Why current can still flow through the ammeter when there is no potential difference across that wire?

published 10 years ago

rich11292000

10 years ago

Delete the ammeter to see the potential.

nikisalli

10 years ago

Because in one side of the circuit you have 600mA and the other side 500 so 600-500=100mA

wyoelk

10 years ago

Cuz the ammeter is in parallel

hurz

10 years ago

Cuz of 1 Ohm difference 6/5 its unsymmetric!

Bob2016

10 years ago

A perfect amp meter has 0 ohms of internal resistance so by Ohms Law the difference current of 100 ma x O ohms = 0 V across the meter. One example is a super conductor which has 0 resistance at cryo temperatures yet can carry thousands of amps with 0 volts across it.

thebugger

10 years ago

The two legs of the circuit aren't symmetric. If you have 2/1ohm and 3V at the left you should have 4/2ohm and 6V on the right, for it to be symmetrical, and then no current will flow to the ammeter

thebugger

10 years ago

Or if you have 5/1ohm at 3V at the left (as it is) you must have 10/2ohm at 6V at the right for it to be symmetrical. It's simple math.

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