- (A) Only holes
- (B) Only free electrons
- (C) Holes and free electrons
- (D) None of the above
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- (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) 6 x 104 cm
- (B) 60 x cm
- (C) 3 x 106 cm
- (D) 6 x 10-4 cm
- (A) Germanium
- (B) Silicon
- (C) Carbon
- (D) Sulphur
- (A) 3
- (B) 5
- (C) 4
- (D) 6
- (A) Very narrow depletion layer
- (B) Almost no current
- (C) Very low resistance
- (D) Large current flow
- (A) 5 V
- (B) 3 V
- (C) Zero
- (D) 0.3 V
- (A) Diffusion
- (B) Pressure
- (C) Ionisation
- (D) None of the above
- (A) Repel each other
- (B) Attract each other
- (C) Have no effect on each other
- (D) None of the above
- (A) +ve terminal to p and –ve terminal to n
- (B) -ve terminal to p and +ve terminal to n
- (C) -ve terminal to p and –ve terminal to n
- (D) None of the above
