Electronics MCQ

Q. Each atom in a silicon crystal has
a. four valence electrons
b. four conduction electrons
c. no valence electrons because all are shared with other atoms
d. eight valence electrons, four of its own and four shared

Q. Recombination is when
a. an electron falls into a hole
b. a positive and a negative ion bond together
c. a valence electron becomes a conduction electron
d. a crystal is formed

Q) Electron-hole pair are produced by
a. recombination
b. thermal energy
c. ionization 
d. doping

Q) The amount of AC content in the output of rectifier is called 
A) form factor
B) ripple factor
C) peak factor
D) Knee factor

Q) Due to forward bias voltage , width of depletion region
A) Enhances
B) Narrows
C) Remain same
D) None of the above

Q.) Barrier potential for silicon diode is
A) 0.3V
B) 0.4V
C) 0.1V
D) 0.7V

Q.) total current drawn from four 1.5V cells connected in series is 1 ampere. Each cell supplies 
1.) 1 A
2.) 0.25 A
3.) 1.5 A
4) 4 A

Q.) In an electronic circuit, common reference point is 
1.) always the negative battery terminal
2.) always the most positive point
3.) always the most negative point
4.) may be any point

Q.) The superposition theorem is based on 
1.) linearity
2.) Duality
3.) Reciprocity
4) Non-linearity