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Electricity question
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No, as previously mentioned, one end of the battery is 1.5V relative to the OTHER end, not relative to any ground.
If you connect one end of a battery to a 1000V DC power supply, and measure across the battery, it will still read 1.5V
AC/DC has nothing to do with it, since you're not measuring anything having to do with AC anyway.
RaynorWolfcastle
Diamond Member
The short answer is that there is nothing generating a potential difference between the two prongs of your voltmeter.
Pepsi90919
Lifer
yeah, if you actually connected it to the battery
Heisenberg
Lifer
Having a potential difference between two points has nothing to do with completing a circuit. The electric potential comes from the sole fact that an electric field is a conservative vector field, and so can be described by a scalar potential.
RaynorWolfcastle
Diamond Member
That's the (slightly) more complicated explanation, but if he's asking this question to start with, I don't think this is the explanation he's looking for.
Pepsi90919
Lifer
no that's what everyone else was trying to tell you
Heisenberg
Lifer
Yeah, I know, but the whole "needing to complete a circuit to have a potential thing" isn't right so I wanted to clear up any misconceptions.
Stealth1024
Platinum Member
the neutral in a wall socket is not AC or DC this has nothing to do with it...
Oh boy .................
Well, no.. because you are not completing the circuit. With 40+ posts, I'd hope that at least has already been covered..
Look at it this way, the electrons are trying to get back to the battery.
If you have a wire connected to the + side.. the electrons are going to start marching through the wire... they'll encounter your voltmeter... continue through it, and into the neutral wall wire.
Now, where are they going to go? Keep marching off into oblivion, traversing millions of miles of copper wire? Back to the power station?
In reality, they never started marching in the first place, since there was no circuit. But you get the idea.
Well, no.. because you are not completing the circuit. With 40+ posts, I'd hope that at least has already been covered..
Look at it this way, the electrons are trying to get back to the battery.
If you have a wire connected to the + side.. the electrons are going to start marching through the wire... they'll encounter your voltmeter... continue through it, and into the neutral wall wire.
Now, where are they going to go? Keep marching off into oblivion, traversing millions of miles of copper wire? Back to the power station?
In reality, they never started marching in the first place, since there was no circuit. But you get the idea.
TheLonelyPhoenix
Diamond Member
Wow. I thought the math/science threads were bad... this is WRETCHED. Half the people in this thread have completely pulled answers out of their asses.
*pulls up a lawnchair*
Keep it up, boys. I haven't had enough entertainment today.
*pulls up a lawnchair*
Keep it up, boys. I haven't had enough entertainment today.
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