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Metals like copper, silver, gold, iron, etc are examples of ohmic metals.
Another AnswerThere are very few ohmic materials. Ohmic materials are those that obey Ohm's Law, and very few do -which might come as a surprise to many people (Ohm's Law is NOT universal law!)! For a material to obey Ohm's Law, the ratio of voltage to current must remain constant for variations in voltage. Because increasing current causes increasing temperature, the resistance (and, therefore, the ratio of voltage to current) of most materials will change for variations in voltage.
So, an ohmic material must maintain an approximately-constant resistance over a wide range of temperatures -so metals such as copper, silver, gold, etc., do NOT qualify! However, alloys such as constantan (a nickel-copper allow) would qualify as being ohmic.
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What is the difference between ohmic and non ohmic elements?
An 'ohmic' resistor is one which obeys Ohm's Law. For Ohm's Law to apply, the resistance of a circuit must be constant over the range of incremental voltages applied to it. If the resistance changes over an incremental range of voltages, then it is said to be 'non-ohmic', and it does not obey Ohm's Law.
If you decrease resistance the current will increase or decrease?
It depends on whether the material is ohmic or non-ohmic.If it is ohmic, then it will obey Ohm's Law, and its resistance will remain constant if the current decreases.If, on the other hand, it is non-ohmic, it will not obey Ohm's Law and, if the temperature of the conductor falls (assuming it is a metallic conductor) due to the fall in current, then its resistance will fall too.
When is a material said to be ohmic?
An ohmic material follows Ohm's law, which states that V = I*R. This means that the potential difference in a system is equivalent to the total resistance multiplied by the current running through the system. This relationship, as you might have noticed, is a linear relationship. Most materials are approximately ohmic, however, there are exceptions. The resistance of a system remains mostly the same except at high temperatures, and Ohm's law assumes that materials will not undergo drastic temperature changes or be subjected to very high or low temperatures. However, it is generally a good approximation.Another AnswerIf you conduct and experiment that allows you to plot a graph of current against variations in voltage, and that graph turns out to be a straight line, then the material through which that current is flowing is said to be 'linear' or 'ohmic', which means that it obeys Ohm's Law.In essence, Ohm's Law is true when the ratio of voltage to current is constant for variations in voltage.However, very few materials and electronic devices are 'ohmic'. Repeating the same experiment with most materials will result in a curved-line graph, which tells us that that material/device is 'non-linear' or 'non-ohmic'. So most materials/devices DO NOT obey Ohm's Law. So an argument can be made that Ohm's 'Law' isn't a law at all, but simply describes the behaviour of a limited number of materials.The equation, R = E/I, which is derived from the definition of the ohm, and NOT from Ohm's Law, applies whether Ohm's Law is obeyed or not, as it tells us what the resistance of a material/device is at a particular value of voltage (as opposed to a range of voltages).
What is ohmic decay?
Ohmic decay is the wasting away of dipolar magnetic fields. This decaying takes place over a very long period of time.
Glass is an example of what kind of material?
Manmade material
What are Ohmic and Non - Ohmic conductor?
ohmic ocnductor is a material which obeys ohm's law: i.e. the voltage and current are directly proportional 2 each other anda non-ohmic ocnductor is a material which doesn't obey ohm's law:)
Example of non -ohmic and ohmic materials?
iron,gold
What is the shape of graph of voltage versus current for an ohmic material?
Linear.
Are human body make of Ohmic material?
The presence of the ohmic material in theÊbody depends on ourÊbody resistance. When dry, resistance is 100,000 ohms. When wet due to sweat or water, resistance is 1000 only.Ê
What is non ohmic material?
A 'non-ohmic' conductor is one that does not obey Ohm's Law -i.e. the ratio of voltage to current is not constant when the voltage across it varies.
What is an example of an ohmic resistor?
i give the ans why iam asking you
Due to heat would the resistance in non-ohmic material decrease or increase?
Increase
What are non ohmic devices give an example?
non ohmic devices are diodes, LED's, Thermistors, LDR(light dependent resistors, cells in series.
Is Thermistor ohmic or non-ohmic?
no.....thermistors are not ohmic.
What is bulk resistivity?
Bulk resistance is the ohmic resistance of the semiconductor material. The natural resistance of a "P" type or "N" type semiconductor material.
Is vacuum tube ohmic or non-ohmic and why?
Vacuum tubes are non-ohmic devices
What are ohmic and non - ohmic conductors?
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
