Question

What is unbiased diode?

Answer 1

Hint:Here, you are asked what an unbiased diode is. In order to answer this question, first consider a p-n junction diode and then what all kinds of possibilities are there that we can apply on a diode or as assumed, a p-n junction diode. By possibilities, what is meant is that we actually connect a battery or basically apply a voltage source across the diode in order to use the diode, so use the number of possible ways in which we apply a voltage source across it and then comment on the meaning of unbiased diode.

Complete answer:
First, let us look for what a p-n junction diode is. When we dope a pure semiconductor or an intrinsic semiconductor with impurities having pentavalency, then the resulting substance is known as n-type semiconductor. On the other hand, if we dope a pure or intrinsic semiconductor with impurities having trivalency, then the resulting substance is known as a p-type semiconductor. Now, if we join p-type and n-type semiconductor, we get a p-n junction diode.

Now, the main purpose is to determine what unbiased diode is. When we connect the positive terminal of the battery to the p-side and negative terminal of the battery to the n-type, we obtain a diode which is a forward-biased diode. When we connect the negative terminal of the battery to the p-side and positive terminal of the battery to the n-type, we obtain a diode which is a reverse-biased diode. Now, when the diode is not in contact with any of the terminals of the battery, we have an unbiased diode.

So, an unbiased diode is a diode which is not connected to a battery or is not connected to any voltage source.

Note:We have discussed in brief about p-n junction diodes so remember how it is made. Also, keep in mind that an intrinsic semiconductor is the purest form and extrinsic semiconductor is not the pure form. Remember that the unbiased diode is not connected to any voltage source, also there are two cases in biased diode, one is forward and the other is reverse, so make sure you remember that.