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voltage difference: negative compared to ground

D

dpopiz

Diamond Member
I'm a bit confused about voltage. If I have one wire that's +150V and another that's -150V, the difference is 150V right?

but if I have +150V and 0V (ground), the difference is 150V right?

what's going on?
 
Originally posted by: dpopiz
I'm a bit confused about voltage. If I have one wire that's +150V and another that's -150V, the difference is 150V right?

but if I have +150V and 0V (ground), the difference is 150V right?

what's going on?
Click to expand...

Difference between +150V and Ground == 150V

Difference between -150V and Ground == 150V

Difference between +150V and -150V == 300V

Remember voltages are all relative, 0V is just a reference we've set. So, if you consider the '-150V' to be your ground, then you can measure the +150V as 300V
 
Originally posted by: So
Originally posted by: dpopiz
I'm a bit confused about voltage. If I have one wire that's +150V and another that's -150V, the difference is 150V right?

but if I have +150V and 0V (ground), the difference is 150V right?

what's going on?
Click to expand...


Difference between +150V and -150V == 300V

Remember voltages are all relative,
Click to expand...

:thumbsup: 300V is the answer
 
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