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What is a linear resistor?
which obey ohms law ANSWER: Not all potentiometers are linear some are made to follow a logarithm function some follows an exponential function. A linear potentiometer will have a linear curve. Materials that obey Ohm's Law are called 'linear' or 'ohmic'; those that don't are called 'non-ohmic' or 'non-linear'.
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,...
Are fixed resistors ohmic?
yes
What are non ohmic devices give an example?
non ohmic devices are diodes, LED's, Thermistors, LDR(light dependent resistors, cells in series.
What is the shape of graph of voltage versus current for an ohmic material?
Linear.
Example of non -ohmic and ohmic materials?
iron,gold
When the voltage across the ends of a piece of wire is doubled what effect does this have on the current in the wire?
current doublesAnswerIt depends on whether the wire is ohmic or non-ohmic. If it is ohmic, then the current will also double. If, like tungsten, it is non-ohmic, then it depends.... because doubling the voltage will cause its resistance to increase.Ohmic materials obey Ohm's Law, whereas non-ohmic materials do not.
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.
What are the problems with Ohm's law?
The main problem is that, despite its name, it is not really a 'law'! It applies to very few materials (called 'ohmic' or 'linear' materials). The vast majority of materials (called 'non-ohmic' or 'non-linear') simply do not obey Ohm's 'Law'!
Is Thermistor ohmic or non-ohmic?
no.....thermistors are not ohmic.
What is the example of ohmic material?
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.
Are human body make of Ohmic material?
No, the human body is not made of Ohmic material. Ohmic materials have a linear current-voltage relationship, which is not typically seen in biological systems like the human body. Biological tissues have complex electrical properties that are not accurately described by Ohmic behavior.
How do the types of conductors which do not obey Ohms law have an application in circuit design?
Ohm's Law is by no means universal -it doesn'tapply to all materials. In fact, it doesn't apply to most materials or electrical devices! For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltages This is only true for 'ohmic' or 'linear' materials; those materials that do not obey Ohm's Law are called 'non-ohmic' or 'non-linear'.However, being 'non-ohmic' doesn't mean that there are noapplications for these materials! For example, a tungsten lamp filament is 'non-ohmic', but is obviously very widely used. Numerous other non-ohmic materials and devices are also widely-used, including diodes, vacuum tubes, etc.Some materials are 'non-ohmic' over for a particular range of voltage differences, then become 'ohmic' after the voltage reaches a particular value (e.g. a vacuum diode).Remember, though, that the ratio of voltage to current will always indicate the resistance for that particular combination of voltage and current, whether a material or device obeys Ohm's Law or not.Despite what most electricians think, the equation R = V/R is derived from the definition of the ohm, and has nothing whatsoever to do with Ohm's Law!
What are ohmic and non - ohmic conductors?
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
Differentiate between ohmic and non ohmic substances?
which law follow non ohmic substances
What is the difference between an ohmic resistor and a non-ohmic resistor?
A non-ohmic resistor doesn't have a constant resistance. A ohmic resistor has a constant resistance.
What are the non ohmic materials give examples?
Non-ohmic materials are those that do not follow Ohm's law (V=IR). Examples include semiconductors like silicon, LEDs (light-emitting diodes), and diodes. These materials have a nonlinear relationship between voltage and current.
