Post History
Is the Thevenin's Theorem being applied incorrectly for the circuit ? It's being applied inaccurately. The final Thevenin voltage should be 2.782 volts (rather than your calculated value of 2....
Answer
#3: Post edited
by
Andy aka
·
2022-05-22T12:21:36Z (over 2 years ago)
- > _Is the Thevenin's Theorem being applied incorrectly for the circuit ?_
- It's being applied inaccurately. The final Thevenin voltage should be 2.782 volts (rather than your calculated value of 2.61 volts). I calculate the Thevenin resistance to be 759 ohms (near enough to yours so that it doesn't matter). Double check with simulator for the Thevenin voltage: -
- > _Is the Thevenin's Theorem being applied incorrectly for the circuit ?_
- It's being applied inaccurately. The final Thevenin voltage should be 2.782 volts (rather than your calculated value of 2.61 volts). I calculate the Thevenin resistance to be 759 ohms (near enough to yours so that it doesn't matter). Double check with simulator for the Thevenin voltage: -
- 
- > _I can accurately calculate the Ib = 2.09mA by using Kirchoff's Voltage law_
- Then you have miscalculated because, if 2 mA were flowing into the base then, due to hFE (~40), the emitter current would be about 80 mA and, if 80 mA were flowing through the emitter resistor of 200 Ω then there would be an emitter voltage of 16 volts and clearly, that has to be nonsense.
#2: Post edited
by
Andy aka
·
2022-05-19T16:34:27Z (over 2 years ago)
- > _Is the Thevenin's Theorem being applied incorrectly for the circuit ?_
It's being applied inaccurately. The final Thevenin voltage should be 2.783 volts (rather than your calculated value of 2.61 volts). I calculate the Thevenin resistance to be 759 ohms (near enough to yours so that it doesn't matter).
- > _Is the Thevenin's Theorem being applied incorrectly for the circuit ?_
- It's being applied inaccurately. The final Thevenin voltage should be 2.782 volts (rather than your calculated value of 2.61 volts). I calculate the Thevenin resistance to be 759 ohms (near enough to yours so that it doesn't matter). Double check with simulator for the Thevenin voltage: -
- 
#1: Initial revision
by
Andy aka
·
2022-05-19T16:30:25Z (over 2 years ago)
> _Is the Thevenin's Theorem being applied incorrectly for the circuit ?_ It's being applied inaccurately. The final Thevenin voltage should be 2.783 volts (rather than your calculated value of 2.61 volts). I calculate the Thevenin resistance to be 759 ohms (near enough to yours so that it doesn't matter).