Related Questions

Addition of pentavalent impurity to a semiconductor creates many
A Free electrons
B Holes
C Valence electrons
D Bound electrons
The impurity level in an extrinsic semiconductor is about of pure semiconductor.
A 10 atoms for 108 atoms
B 1 atom for 108 atoms
C 1 atom for 104 atoms
D 1 atom for 100 atoms
A pentavalent impurity has ___________ Valence electrons
A 3
B 5
C 4
D 6
Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor ___________
A Remains the same
B Increases
C Decreases
D None of the above
Addition of trivalent impurity to a semiconductor creates many
A Holes
B Free electrons
C Valence electrons
D Bound electrons
A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?
A 8\/9
B 7\/10
C 7\/8
D 6\/11
If 1 is added to the numerator of a fraction, the fraction becomes 1. If 1 is added to the denominator, the fraction becomes 12Find the fraction.
A 13
B 12
C 23
D 34
নিম্নের কোনটি p-টাইপ অর্ধপরিবাহীতে n-টাইপ অর্ধপরিবাহীর তুলনায় বেশি আছে? (Which of the following does a p-type semiconductor have more compared to an n-type semiconductor-)  
A মোট ধনাত্মক আধান (total positive charge)
B মোট আধান (total charge)
C ইলেকট্রন ঘনত্ব (density of electrons)
D হোল ঘনত্ব (density of holes)
If the iron ore contains clay as an impurity, the flux added during calcination, is
A Clay
B Lime stone
C Argillaceous iron ore
D All the above

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