1
A semiconductor is formed by ……… bonds.
Answer: Covalent
Questions
3
The resistivity of pure germanium under standard conditions is about ……….
Answer: Ω cm
5
When a pentavalent impurity is added to a pure semiconductor, it becomes ………
Answer: n-type semiconductor
6
Addition of pentavalent impurity to a semiconductor creates many ……..
Answer: Free electrons
8
Addition of trivalent impurity to a semiconductor creates many ……..
Answer: Holes
9
A hole in a semiconductor is defined as …………….
Answer: The incomplete part of an electron pair bond
10
The impurity level in an extrinsic semiconductor is about ….. of pure semiconductor.
Answer: 1 atom for 108 atoms
11
A hole and electron in close proximity would tend to ……….
Answer: Attract each other
12
In a semiconductor, current conduction is due to ……..
Answer: Holes and free electrons
13
A forward biased pn junction diode has a resistance of the order of
Answer: Ω
15
In the depletion region of a pn junction, there is a shortage of ……..
Answer: Holes and electrons
17
When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on……
Answer: Minority carriers
18
With forward bias to a pn junction , the width of depletion layer ………
Answer: Decreases
20
In an intrinsic semiconductor, the number of free electrons ………
Answer: Equals the number of holes
