A forward biased pn junction diode has a resistance of the order of_____________?
(A) O
(B) kO
(C) MO
(D) None of the above
In a semiconductor, current conduction is due to________________?
(A) Only holes
(B) Only free electrons
(C) Holes and free electrons
(D) None of the above
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 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 most commonly used semiconductor is________________?
(A) Germanium
(B) Silicon
(C) Carbon
(D) Sulphur
A reverse bias pn junction has_____________?
(A) Very narrow depletion layer
(B) Almost no current
(C) Very low resistance
(D) Large current flow
The barrier voltage at a pn junction for germanium is about________________?
(A) 5 V
(B) 3 V
(C) Zero
(D) 0.3 V
The random motion of holes and free electrons due to thermal agitation is called______________?
(A) Diffusion
(B) Pressure
(C) Ionisation
(D) None of the above
A hole and electron in close proximity would tend to________________?
(A) Repel each other
(B) Attract each other
(C) Have no effect on each other
(D) None of the above