BJT (Bipolar Junction Transistor) Solved Problem | Quiz # 449

In this video, for the given BJT circuit, the current through 20-ohm resistor is calculated.
Here is the detail of the Quiz.
The Zener diode in the circuit has a breakdown voltage of 5V. The current gain β of the transistor in the active region is 99. Ignore the base-emitter voltage drop VBE . The current through 20 Ω resistor in mA is ________
Subject: Analog Electronics
Topic: BJT (Biploar Junction Transistor)
For more solved examples on BJT, check this playlist:
• Bipolar Junction Trans...
For more video tutorials on BJT, check this playlist:
• BJT (Bipolar Junction ...
#ALLABOUTELECTRONICSQuiz
#analogelectronics
#bjt
#bipolarjunctiontransistor
The Quiz will be helpful to all the students of science and engineering for preparing for university or competitive exams (GATE, IES, etc.)
Follow me on KZbin:
/ allaboutelect. .
Follow me on Facebook:
/ allaboutelec. .
Follow me on Instagram:
/ all_about.e. .
Music Credit:
www.bensound.com/

[@allaboutelectronics-quiz]

For more solved examples on BJT, check this playlist: bit.ly/3gSH7x4 For more video tutorials on BJT, check this playlist: bit.ly/3VNfadv

[@hareesh2377]

Thanks for the information

[@sanjayshah9838]

Excellent 👌

[@hasan5658]

iff zener diode is not in reverse bias then it will be in forward bias and it will be act as a ideal diode?

[@allaboutelectronics-quiz]

For Zener diode to be in forward bias condition, the voltage at the anode of the diode should be more than cathode. In this case, for that to happen, the voltage at the emitter of BJT should be more than base. In this case, clearly that is not the case. So, Zener diode is definitely in reverse bias condition. Only thing that we need to find out is , whether it is operating in the breakdown region or not. When it is operating in the breakdown region, then voltage across it will be 5V, and when it is not operating in that region, then it will simply act as an open circuit.

[@hasan5658]

yes my mistake. We could also calculate thevenin voltage across zener diode to find whether is is in breakdown or not?@@allaboutelectronics-quiz

[@allaboutelectronics-quiz]

The Thevenin's Theorem is applicable to only linear networks and linear devices. BJT is non-linear device. For more info, please go through this video on Thevenin's Theorem for basics: kzbin.info/www/bejne/bqbHqIOZatV2paMsi=6hMSogX0yjQjMUM7

[@poojashah6183]

👌🏻👌🏻👍🏻