- #1
Elquery
- 67
- 10
Howdy,
Pretty elementary question, I think. Looking at Ohm's law, current is I=V/R
For a given voltage (let's use 120 for typical U.S.A household) at what resistance will current actually cease to flow (equal zero)?
To clarify and expand on that: I am confused about whether a system with an open circuit (incomplete in regard to intentional conductors that is) will still find paths to slowly bleed current through, even though those paths are extremely high resistance. According to the equation, as resistance gets higher, current gets closer to zero, but never to zero. It would seem resistance would have to infinite for current to reach zero.
Are some things practically of such great resistance to act as though they're infinite? I am thinking along the lines of building materials like plastic conduit, drywall, insulation, etc)
Pretty elementary question, I think. Looking at Ohm's law, current is I=V/R
For a given voltage (let's use 120 for typical U.S.A household) at what resistance will current actually cease to flow (equal zero)?
To clarify and expand on that: I am confused about whether a system with an open circuit (incomplete in regard to intentional conductors that is) will still find paths to slowly bleed current through, even though those paths are extremely high resistance. According to the equation, as resistance gets higher, current gets closer to zero, but never to zero. It would seem resistance would have to infinite for current to reach zero.
Are some things practically of such great resistance to act as though they're infinite? I am thinking along the lines of building materials like plastic conduit, drywall, insulation, etc)