How would you describe the validity of Ohm’s law? What is meant by the statement that Ohm’s law is not a fundamental law of nature?
2007-06-05 03:13:58 · 5 answers · asked by walt 2 in Science & Mathematics ➔ Physics
Ohm's Law is a statistical relationship between applied voltage and electric current through a material. The underlying physics (Lorentz force, scattering, ...) is fundamental. This is the bulk statistical effect on the quantum dynamics. In effect, it is a statement that the resistance to the flow of electrical current is proportional to the velocity of the electrons.
It is valid only in simple, rather ideal, circuits. There are always limitations based on other effects. How limiting they are depends on the specifics.
2007-06-05 03:28:49 · answer #1 · answered by jcsuperstar714 4 · 1⤊ 0⤋
It's valid at the macroscopic level, but at the quantum level it becomes subject to uncertainty, just like everything else.
Ohms Law isn't a fundamental physical law, but rather a relationship between physical quantities. It doesn't define or imply any kind of natural limits in the same way as (for example) the Laws of Thermodynamics.
Doug
2007-06-05 03:22:11 · answer #2 · answered by doug_donaghue 7 · 1⤊ 1⤋
Personally, I think NT Christianity is the best incarnation of the religion. However, the OT laws should absolutely be considered in context to the time and culture -- the Jews under Moses were governed by their religion, under circumstance not applicable to most people today. I agree to the premise that Christians are (how obvious is this) followers of the teachings of Jesus, and it doesn't make sense to favor OT governance. Not to say there isn't anything of value in the OT, but it conflicts so strongly with the teachings of Jesus, and the image of God, that I find them wholly incompatible. To understand Christianity, and be a Christian, one MUST understand the role of Jesus as fulfilling the Law of the OT, and bringing in a new era of grace, mercy and love in a humanistic way which opposes the authoritarian doctrine of the OT.
2016-05-17 07:44:02 · answer #3 · answered by ? 3 · 0⤊ 0⤋
The Ohm's law is valid as long as physical state and temperature of conductor remains constant.
As resistance varies with change in length and area of conductor (R=rho*L/a). And it also varies with change in temperature (except special alloys); if increase of R is linear, then for fixed value of V, I increase linearly.
https://www.electrikals.com/
2016-03-04 16:14:54 · answer #4 · answered by Robert 4 · 0⤊ 0⤋
it applies to certain conductors(not all conductors) like metal wires etc at fixed temperature.
2007-06-05 03:22:54 · answer #5 · answered by Anonymous · 1⤊ 0⤋