engineering recuitment HPCL Junior Executive 2025 Mock Test Analog Electronics Bipolar Junction Transistors BJT As a Amplifier
The transistor switch as shown in figure has β = 120, VCE(sat) = 0.2 V, RC = 1.2 kΩ and VCC = 5 V.
The output voltage when the transistor switch is closed and the minimum base current needed to close the switch are, respectively:
1
0.2 V and 3.33 μA
2
2 V and 3.33 μA
3
0.2 V 33.3 μA
4
2 V and 33.3 μA