Related Questions

At room temperature, an intrinsic silicon crystal acts approximately as
A A battery
B A conductor
C An insulator
D A piece of copper wire
In a class of 60 students, 20 students like Math, 25 students like English and 30 students like Science. If 5 Students like both Math and Science, 8 Students like both English and Science and 3 students like neither of these subjects, how many students like all of the three subjects?
A 2
B 3
C 4
D 5
The charge of a room at Sheraton is 25% less than that of a room at Westin and 10% less than that of a room at Sonargaon . By what percent is the charge of a room at Westin is greater than that of Sonargaon ?
A 15%
B 17%
C 19%
D 20%
If the crystal frequency changes with temperature, we say that crystal has ___________ temperature coefficient
A Positive
B Zero
C Negative
D None of the above
At room temperature, an intrinsic semiconductor has ___________
A Many holes only
B A few free electrons and holes
C Many free electrons only
D No holes or free electrons
At room temperature the current in an intrinsic semiconductor is due to
A Holes
B Electrons
C Ions
D Holes and electrons
At room temperature the number of conducting electrons in an intrinsic semiconductor
A Is almost equal to the number of valence electrons
B Is about half the number of valence electrons
C Is small as compared to the number of valence electrons
D Is a very small fraction of the number of valence electrons
At room temperature an intrinsic semiconductor has
A a few free electrons and holes
B many holes
C many free electrons
D No holes
E None of the above
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?
A Doping
B Valence electrons
C Free electrons
D Thermal energy
E None of the above
The length of a room is 1.5 times of its breadth. If the area of the room is 216 sq. meter, what is the perimeter of the room?
A 42
B 48
C 54
D 60

Next steps