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An ohmic resistor is a resistor that obeys Ohm's law, and a non-ohmic one dose not. All resistors resistance will begin to change as there temperature changes, and often we need a resistor with a steady resistance, thus some resistors, which we refer to as ohmic, will disperse the heat being generated and therefore it will keep a steady resistance. Resistors that do not disperse their heat will have varying resistances and therefore are non ohmic.
Ohms law, named after the German physicist Georg Ohm, states that the current through a conductor, between two points, is directly proportional to the potential difference (voltage) across the two points, and inversely proportional to the resistance between them.
~Ben Frilay-Cox
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∙ 14y ago
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∙ 11y agoAn ohmic conductor is one that obeys Ohm's Law: that is, the ratio of voltage to current remains constant for variations in voltage. A non-ohmic conductor (e.g. tungsten) is one that does not obey Ohm's Law: that it, the ratio of voltage of current changes for variations in voltage.
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∙ 14y agoThe real resistance of a contact. This is important to know due to I^2*R losses. The contact may only be designed to dissipate so much heat.
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∙ 11y agoFor a conductor at constant temperature, the current in the conductor is proportional to the voltage across it.
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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.
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.
Which Materials which offers low resistance to flow of current is a good conductor?
All of them. That's the definition of "conductor".
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.
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.
What are ohmic and non - ohmic conductors?
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
What is an ohmic conductor?
ohmic conductors are those which obey ohm's law
Is diode ohmic or non-ohmic conductor?
Diode is a non-ohmic conductor since in diodes current-voltage relation ship does't obey Ohm's law....the relationship between current and voltage is nonlinear here,...
Is the 10 ohm resistor ohmic or non-ohmic?
If it has constant temperature (one can do this by dipping it in a beaker of water) it can be considered an ohmic conductor since Ohm's law states that the Voltage and amperage are directly proportional in a metallic conductor of constant temperature.
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:)
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.
Is metal wire an ohmic conducter?
That depends on the what substance the wire is made from. Wires made from metals, such as iron, copper, gold, are good conductors. Wires made from aluminum would not be as good of a conductor.
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.
Is Thermistor ohmic or non-ohmic?
no.....thermistors are not ohmic.
Which is better a insulator or conductor to transfer heat?
By definition, a conductor.
What is the definition of bare wire or conductor?
uncovered conductor such as insulation ,that is said to be bare conductor.
Why is the graph of the non-ohmic conductor is curved in nature?
Ohmic (or 'linear') materials obey Ohm's Law. That is, their ratio of voltage to current remains constant for variations in voltage. Ohmic materials, therefore, produce a straight line graph when we plot current against variations in voltage;Non-ohmic (or 'non-linear') materials do not obey Ohm's Law. That is, their ratio of voltage to current variesfor variations in voltage. This means that non-ohmic materials produce a curved line graph when we plot current against variations in voltage.
