-
If the transistors in figure have high values of β and a VBE of 0.65V, the current I flowing through the 2 kΩ resistance will be—
-
- 1 mA
- 3.33 mA
- 0
- 5 mA
Correct Option: A
For DC current
IE2 ≈ IE1
or IC2 ≈ IC1
Neglecting IB1 which will be very small, β being very high, the base voltage of Q1 is
VB1 = | (by using potential divider method) | (1.65 kΩ) 6.5 kΩ + 1.85 kΩ + 1.65 kΩ |
= 10 × | = 1.65 V IE1 | 10 |
= | = | mA. | 1 kΩ | 1 kΩ |
The current flowing through the 2 kΩ resistor is 1 mA.
Since IC2 ≈ IC1.
Hecne alternative (A) is the correct answer.