Match List-I with List-II and select the correct answer using the options given below:
| List-I (Equation) | List-II (Relation between/Description) |
| a. Continuity equation | 1. Relates diffusion constant with mobility |
| b. Einstein's equation | 2. Relates charge density with electric field |
| c. Poisson's equation | 3. Relates flow with rate of change of concentration in space |
| d. Diffusion equation | 4. Rate of change of minority carrier density with time |
A. a-4, b-1, c-3, d-2
B. a-4, b-1, c-2, d-3
C. a-1, b-4, c-2, d-3
D. a-1, b-4, c-3, d-2
Answer: Option B
The forbidden energy gap between the valence band and conduction band will be least in case of
A. Metals
B. Semiconductors
C. Insulators
D. All of the above
For a NPN bipolar transistor, what is the main stream of current in the base region?
A. Drift of holes
B. Diffusion of holes
C. Drift of electrons
D. Diffusion of electrons
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
For a P-N diode, the number of minority carriers crossing the junction depends on
A. Forward bias voltage
B. Potential barrier
C. Rate of thermal generation of electron hole pairs
D. None of the above

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