A. Positively charged
B. Negatively charged
C. Electrically neutral
D. None of the above
✅ The correct answer is option C.
Semiconductor Theory MCQs
12. 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
✅ The correct answer is option B.
13. A forward biased pn junction diode has a resistance of the order of_____________?
A. O
B. kO
C. MO
D. None of the above
✅ The correct answer is option A.
14. A semiconductor has generally_______________valence electrons?
A. 2
B. 3
C. 6
D. 4
✅ The correct answer is option D.
15. The resistivity of pure germanium under standard conditions is about_______________?
A. 6 x 104 cm
B. 60 x cm
C. 3 x 106 cm
D. 6 x 10-4 cm
✅ The correct answer is option B.