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Consider the two port transistor circuit as given above—
Match List-I with List-II and select the correct answer using the code given below the lists—
List-I (Hybrid Parameter) List-II (Circuit Element)
A. h11 1. 1/re + rd
B. h12 2. rb + re
C. h21 3. µbc
D. h22 4. αcb
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- AB C D
2 1 4 3
- A B C D
4 3 2 1 - A B C D
2 3 4 1 - A B C D
4 1 2 3
- AB C D
Correct Option: C
The given network 
Applying KVL in the input side, we get
V1 = I1 (re + rb) + µbcV2 . . . . . …(i)
Applying KCL in the output side, we get
| I2 = | + αcb I1 …. . . . .(ii) | |
| re + rd |
On comparing equation (i) and (ii) with standard equation:
V1 = h11I1 + h12V2
I2 = h21I1 + h22V2
We get
● h11 = re + rb
● h12 = µbc
● h21 = αcb
| ● h22 = | |
| re + rd |
So,
A → 2
B → 3
C → 4
D → 1
Hence alternative (C) is the correct choice.
