Ohm's law is applicable in every case, including resistors, diodes, and transistors.
While the resistance is not constant, particularly with diodes and even more so with transistors, the law applies, but the dynamics of the situation must be taken into consideration.
Even under AC conditions with capacitors and inductors, ohm's law applies, except that now resistance becomes more complex, becoming "impedance" and incorporating reactance, but it still applies so long as you consider every factor.
ANOTHER ANSWER
Ohm's Law does NOT apply to diodes or transistors.
Ohm's Law is a law of constant proportionality. It ONLY applies to those conductors and other components (such as diodes, transistors, etc.) whose ratio of voltage to current remains constant for variations in voltage. It does not apply to conductors or components whose ratio of voltage to current changes for variations in voltage. So Ohm's Law is not a universal law.
Conductors and other devices which obey Ohm's Law are termed 'linear' or 'ohmic'; those that do not (the majority, in fact!) are termed 'non-linear' or 'non-ohmic'. Some, but not all metals, are linear (e.g. tungsten is not) and most electronic components such as diodes, electrolytes, and gases are non-linear.
The ratio of voltage to current is, of course, resistance. And we can use this ratio to determine what the resistance of a device happens to be for that particular ratio, at any given voltage, even for devices that do not obey Ohm's Law. For non-linear devices, the ratio continuously changes for variations in voltage.
So, it's questionably whether Ohm's Law should be 'law' at all, and one might wonder why we even bother to teach it!
It is quite incorrect to define Ohm's Law as, "resistance equals voltage divided by current", as this equation is derived from the definition of the ohm, and NOT from Ohm's Law -which makes absolutely no reference to resistance.
No... Diode block one way... resistor block eitherway.
depletion layer depletion zone juntion region space charge region bipolar transistor field effect transistor variable capacitance diode
No. You cannot create a transistor by connecting two diodes together. There is an interaction between the junctions of a transistor, said interaction being not possible when two diodes are connected together.
A digital circuit composed of bipolar junction transistors (BJTs). Widely used in all variety of electronic applications, especially prior to CMOS circuits becoming popular, TTL superseded the earlier RTL (resistor-transistor) and DTL (diode-transistor) logic designs, which used more power. In TTL, transistors are used to both isolate inputs and perform the logic switching. A "TTL" designation on a circuit input or output indicates a digital circuit rather than analog.Read more: transistor-transistor-logic-electronics
In a JFET the only insulation between the gate and the channel is a reverse biased diode junction, if this junction becomes forward biased then the gate and channel are effectively shorted and the device no longer acts as a transistor (it will act as a forward biased diode instead). In the n-channel JFET, the gate is the P-side of this diode and the channel is the N-side of this diode. To keep this diode reverse biased (and the device operating as a transistor) therefor the gate MUST always be maintained at a voltage more negative than the most negative section of the channel.
Transistor Diode Resistor Capacitor
Transistor, resistor, diode, output.
The junction (diode or transistor) will be destroyed.
A transistor is a switch. A diode directs the flow of current.
A: Actually a transistor have two diode with the base mas a common terminal. the characteristics of these tow diodes however are not the same as a common diode
No... Diode block one way... resistor block eitherway.
its the simplest thing to do. There are three legs in a transistor, one each of collector, base and emitter. So if you need to use it as a diode, just connect either collector-base or emitter-base. Say, if you use an NPN transistor, then the base region will be the anode of diode and emitter or collector will be the cathode of the diode.
No. A diode is not like a transistor, and a transistor is not like (two) diode(s). Taken in isolation, the emitter-base and collector-base junctions of a transistor appear to be diodes, but they are coupled together so that the base-emitter current affects the collector-emitter current.
transistor//
Transistor will be in OFF mode.
Transistor will be in OFF mode.
Transistor will be in OFF mode.