1. (True False) In pure silicon, atoms are held in place by covalent bonds. 2. (
ID: 3349142 • Letter: 1
Question
1. (True False) In pure silicon, atoms are held in place by covalent bonds. 2. (True False) In semiconductors, n-doping means an abundance of free negative charges. 3. (True False) At room temperature, thermal energy causes some covalent bonds to break, and thusly generating free electrons and holes that become available for current conduction 4. (True False) The basic semiconductor construction for a semiconductor diode is a p-n junction. 5. (True False) Intrinsic silicon has no "doping" of p or n type atoms. 6. (True False) A semiconductor diode has only two states, forward biased or reversed biased. 7. (True False) A full-wave power supply circuit must have more than one diode in order to conduct a full 360 degrees of input waveform. 8. (True False) A Zener diode must be forward biased in order to perform the Zener's task. 9. (True False) The depletion region for a p-n junction has no free charges available for conduction. 10. (True False) A "hole" in our semiconductor context is the "space where an electron was that has mass and electric charge".Explanation / Answer
1) true , in silicon there are four electrons in the valence orbit and needs four atom to become stable , so it covalent bonded with four niegbouring atoms.
2)True, n doping means there is free negative charge in the outer shell , and is a donor impurity
3)False, the thermal energy at room temperature is only 0.6 kal/mol, which is lower than that for breaking a covalent bond
4)True, basin semiconductor construction is pn junction
5)True,Intrinsic silicon is undoped semiconductor material.
6)true, it has two state, forward biased and reversed biased
7)True , A full wave circuit must contain atleast 2 diodes for 360 degree operation
8)False, Zener diode can conduct in forward as well as reverse condition
9)True, initally there is no free electrons
10)False, Hole is a place where there is a vacancy of electrons
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