Q5/ Fill in the blank 1. A trivalent impurity is added to...

Q5/ Fill in the blank 1. A trivalent impurity is added to silicon to create __________. 2. The maximum number of electrons that exist in shell 6 is __________. 3. The factors that affect the resistance of any material are __________, __________, __________, __________. 4. The __________ is the most widely used semiconductive material in the electronic devices. 5. The current in a semiconductor is produced by __________.

Transcript

00:01 Hello students in this question we have to fill in the blanks so in the first part we are given that a trivalent impurities added to silicon to create okay so let's say here we have silicon in the periodic table and here we have a group it's a carbon family silicon belongs to carbon family and before that is the boron family in boron family we have aluminium and and so on so from here we can see that the trivalent immunity basically this boron family when we add any element from this boron family to the silicon what will happen let's say this is the silicon crystal silicon has four valence electrons but this aluminium or the trivalent impurity has three electrons only so one hall is created every time we add this so this will form a p type semiconductor as in this semiconductor we have one number of four cell of electrons okay so moving on to the next uh part in the next part in the next part have to tell the maximum number of electrons that exist in shell 6 is.

01:06 Okay so first we have to see how many electrons exist in a particular cell.

01:12 So the number of electrons which exist in a shell is that say in nth shell 2 n squared number of electrons exist.

01:20 So in 6 cell we can say the number of electrons would be 2 times the value of n squared that is times 36.

01:27 So 2 times 36 now this will be equal to 72 and that is the number of electrons present in the ursic shell.

01:33 Okay, moving on to the next part.

01:35 In the next part we have to tell the factors that affect the resistance of any material.

01:40 Okay, so the resistance, the formula for resistance is r equals to row times length divided by area...

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