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Ohm's Law always applies. In every case. That is why we call it a law. Its a matter of perspective.
Ohm's Law says that resistance is voltage divided by current. Nothing more. Nothing less. In particular, it does not say that the "resistor" has constant resistance.
At large currents, conductors get warm. Temperature changes their resistance. Ohm's Law still applies - you just need a new value of resistance.
Take an ordinary 40 watt light bulb. At operating power, it has a resistance of about 360 ohms. When cold, it has a resistance of about 27 ohms. Does it obey Ohm's Law? You bet it does - You just need to understand what the law says and what it does not say.
AnswerOhm's Law most definitely does NOT state that 'resistance is voltage divided by resistance'! It states, essentially, that the ratio of voltage to current must be constant for variations in voltage -which is not the same thing!For Ohm's Law to apply, then, the ratio of voltage to current must remain constant for variations in voltage. So devices such as diodes, or conductors such as tungsten, do not obey Ohm's Law and are, for that reason, termed 'non-linear' or 'non-ohmic'. If you conducted an experiment using tungsten, for example, and plotted current against variations in voltage, the result would be a curve -confirming that tungsten does notobey Ohm's Law. In other words, Ohm's Law is NOT a universal law, and only applies to some materials or devices.
To answer your question directly if, as the current gets larger, the resistance of the conductor changes (due to an increase in its temperture), then the ratio of voltage to current obviously changes too -which means that it is not obeying Ohm's Law. If, on the other hand, an increasing current does not cause a change in resistance (because any increase in temperature does not cause an increase in resistance), then the ratio of voltage to current is constant, and the conductor IS obeying Ohm's Law.
What else can I help you with?
What is the necessary condition for a conductor to obey ohm's law?
No. In fact, most conductors don't obey Ohm's Law.For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage. For many conductors this simply doesn't happen and, for that reason, we call such conductors 'non-linear' or 'non-ohmic'.
Do all conductors obey ohm's law give examples to justify your answer.?
Not all conductors obey Ohm's Law. There are certain materials, like semiconductors and diodes, that do not follow Ohm's Law due to their nonlinear behavior. An example of a conductor that obeys Ohm's Law is a resistor, where the current through it is directly proportional to the voltage applied.
What is an ohmic conductor?
ohmic conductors are those which obey ohm's law
How do conductors obey the Ohm's law?
Very few conductors obey Ohm's Law, and its the rise in temperature of the conductor when current flows though it that prevents it from obeying Ohm's Law. Some alloys, such as constantan, obey Ohm's Law over a limited range because, over that range, changes in temperature don't affect their resistance. It's really time that we stopped teaching Ohm's Law, as it is not universal, and applies to very few conductors and hardly any electronic components!
What are ohmic and non - ohmic conductors?
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
Why is a thermistor a non ohmic conductor?
Ohm's law states that the current and potential difference (voltage) are directly proportional, provided the temperature is constant. The resistance of a thermistor is dependant on the temperature, so it does not obey Ohm's law. Components that do not obey Ohm's law are non-ohmic conductors.
Application of other conductors which does not obey ohms law in a circuit?
Ohms law is a law; all conductors must obey it. A simple form of ohm's law is V = I / R. The only control a conductor has on this equation is in the 'R'. Super conductors, for example, have a resistance that approaches zero at certain termperatures. This does not mean that they break the law, though.AnswerOhm's Law describes a linear relationship between the potential difference across a conductor; it has nothing to do with the relationship between potential difference, current, and resistance.The equation R = E/I is derived from the definition of the ohm, and not from Ohm's Law. This equation applies whether Ohm's Law is obeyed or not.In fact, relatively few conductors obey Ohm's Law. Those that do are termed 'ohmic' or 'linear' conductors; those that don't are termed 'non-ohmic' or 'non-linear'.Simply put, if the graph representing current plotted against a varying potential difference is not linear, then it ain't obeying Ohm's Law!
Do you believe that it is okay to hit a child if they cry or dont obey?
No I don't. If they do not obey there are other ways to punish.
How did the gods decide to destroy their people?
they that when the people dont obey
Is ohm law true for all conductors?
No. It only applies to a very limited range of conductors that are classified as being 'linear' or 'ohmic'. Most materials are 'non-linear' or 'non-ohmic', and these do NOT obey Ohm's Law. Non-linear conductors include tungsten and non-linear devices include diodes. For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage; if it doesn't, then Ohm's Law doesn't apply. Period!
is ohm s law true for all conductors?
No. It only applies to a very limited range of conductors that are classified as being 'linear' or 'ohmic'. Most materials are 'non-linear' or 'non-ohmic', and these do NOT obey Ohm's Law. Non-linear conductors include tungsten and non-linear devices include diodes. For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage; if it doesn't, then Ohm's Law doesn't apply. Period!
What happens when you dont obey your dad?
u should obey ur dad for goodness sake hes ur dad like <3
