0
Actually, Ohm's law is applicable to semiconductor devices.
The issue is one of perspective. The semiconductor device does not have a purely resistive response curve, so it would seem that Ohm's law falls apart.
Even in the so called linear range, you still have a somewhat non-resistive curve, so there are still limitations.
And, of, course, outside of the linear range, beyond the knee point, everything falls apart, so to speak.
That said, at any instant of time, a semiconductor device can be perceived as a resistor - yes, one that changes value - but still a resistor - at that point of time. As a result, basic circuit analysis techniques including Ohm's law, Kirchoff's laws, and Norton and Thevanin equivalents still hold true.
Answer
Ohm's Law DOES NOT apply to most semiconducting devices, because they are not linear or ohmic -that is the ratio of voltage to current doesn't remain constant for variations in voltage. Semiconducting devices, such as diodes, are termed 'non-linear' or 'non-ohmic' because their ratio of voltage to current ratio changes whenever the applied voltage changes. However, in common with ALL circuits and circuit devices, the ratio of voltage to current will always tell you what the resistance happens to be for any particular ratio. The so-called 'Ohm's Law formula' (R = E/I) is actually derived from the definition of the ohm, and NOT from Ohm's Law!
Wiki User
∙ 8y ago
Wiki User
∙ 13y agoOhm's Law is applicable to AC circuits.
Add your answer:
Earn +20 pts
State the imitation of ohm's law?
imitation of ohms law is that it can be applied only to linear devices it cannot be allowed to non linear devices...
Advantages and disadvantages of ohm's law?
advantages is:1) we are able to analyse relationship between current and voltage.2)able to give the resistance applied in circuit.there is only one limitations that is it can change its value if the circuit is left on for long time.thankyou:).
Do transistors follow ohm's law?
As transistors are made of semiconductors, they do notfollow Ohm's law.A: they cannot follow exactly ohms law since they are themselves no linear active devices
Is ohms law is applicable for transmission line?
Ohm's Law is applicable for transmission lines. It is applicable for every case of every circuit in every situation. That's what makes it a law.The "complexity" is that 1.) resistance is not constant, it being a function of temperature and other factors, and 2.) for AC circuits, impedance makes the calculation complex.AnswerOhm's Law is not a universal law, and applies in very few cases and, then, only to linear or ohmic devices. It certainly doesn't apply 'to every case, of every circuit, in every situation', and many physicists believe that it should not be classified as a 'law'.If, on the other hand, you are referring to the equation, R = V/R (for d.c.) or R = V/Z (for a.c.) then, yes, these do apply to transmission lines. But you should be aware that these equations are not derived from Ohm's Law!
What does the i stand for in ohms law?
Current
Do pure semiconductor obey ohms law?
No semiconductor's do not obey ohm's laws.
Is Ohm's Law applicable in alternating current?
Yes, Ohms law is applicable in altering current.
Ohms law is applicable to linear circuit means what?
You cannot apply ohm's law to non-linear devices. This is because, the non-linearity introduces different V-I characteristics which cannot be answered by mere Ohm's law.
Why ohms law applicable only linear resister?
because they have a proportional relation
State the imitation of ohm's law?
imitation of ohms law is that it can be applied only to linear devices it cannot be allowed to non linear devices...
What are the conditions under which ohms law is applicable?
Ohm's Law is applicable in every case, even in cases of non linear resistance such as diodes and light bulbs, and in reactive cases such as motors in AC operation. It just becomes more complex (no pun intended) to calculate effective resistance.
What is the main objection of ohm's law in measuring resistance?
Temperature. Ohms law is applicable to measure resistance of an element at constant temperature only.
How do you calculate 1.67 ohms?
ohms law.
Advantages and disadvantages of ohm's law?
advantages is:1) we are able to analyse relationship between current and voltage.2)able to give the resistance applied in circuit.there is only one limitations that is it can change its value if the circuit is left on for long time.thankyou:).
Do transistors follow ohm's law?
As transistors are made of semiconductors, they do notfollow Ohm's law.A: they cannot follow exactly ohms law since they are themselves no linear active devices
Why diodes and other electronic devices does not obey ohms law?
Acc to ohm's law-" current flowing in a conductor is directly proportional to the voltage applied across it till its temperature , pressure and other physical parameters are kept constant". This is the major factor ,current remains proportional to applied voltage till temperature is constant and while dealing with semiconductor devices like diodes and transistor , its temperature changes. When current flows within a semiconductor, due to the motion of electrons and collisions in the it, heat is produced and temperature of the semiconductor increases. As semiconductor have negative coefficient of resistance therefore its resistance starts decreasing with the increase in temperature. Hence with the decrease in resistance, its current starts increasing and device shows nonlinear behaviour. that's why ohm's law is not valid for semiconductor. while handling conductors, its temperature also changes as current flows from it but up to a certain range there is not an appreciable change in its resistance and it shows linear behaviour.
How do you find conductance using ohms law?
To find the conductance using ohms law,you take the inverse of the resistance(/R)
