By Team Aakash Byju's

Why Ohm’s Law Is Not Applicable to Semiconductors

Explained:

Ohm’s law describes the conductivity of a conductor to its voltage and resistance.

It states that “the current passing through a conductor varies directly with the voltage across two points”.

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Mathematically, we write Ohm’s law using a proportionality constant called resistance.

I=V/R, where I, V and R  are current, voltage and resistance respectively.

Now, does this law hold good for semiconductors? The answer is No.

Because semiconductors are  non-linear devices, but Ohm’s is valid only for linear devices.

This means that the ratio of voltage to current does not remain constant for variations of voltages in semiconductors.

The graph of voltage and current for the conductors is a straight line.

The graph for semiconductors is a curved one.

It is also evident that Ohm’s law is not applicable at very low or very high temperatures.

Both conductors and semiconductors behave differently given different conditions.

Share these reasons for why semiconductors do not satisfy ohm’s law with your friends and help them revise the concept.