Electronics Engineering: Determine Voltage in Circuit w/ Practical Model

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Discussion Overview

The discussion revolves around determining the voltage at various points in a circuit with respect to ground, using a practical model. Participants are seeking assistance in solving the circuit and clarifying the voltage drops across components, particularly diodes.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants assert that both diodes are in the "on" state, with a voltage drop of approximately 0.7 V across each diode, regardless of the current.
  • One participant calculates the voltage at point A as +25 V, based on a voltage source connected between ground and point A.
  • Another participant calculates the voltage at point B as 24.3 V, derived from the voltage at point A minus the diode drop (25 V - 0.7 V).
  • There is uncertainty expressed about how to determine the voltage at point C, with participants seeking further clarification.
  • Discussion about point D indicates there is a voltage source affecting its voltage, but details are not fully elaborated.

Areas of Agreement / Disagreement

Participants generally agree on the voltage drop across the diodes and the voltage at point A. However, there is uncertainty regarding the voltages at points C and D, and the discussion remains unresolved regarding how to calculate these values.

Contextual Notes

Participants have not fully defined the circuit configuration or the relationships between the points, leading to potential limitations in their calculations. The assumptions about the diode behavior and the voltage sources are also not explicitly stated.

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Determine the voltage with respect to the ground at each point in figure. Assume the practical model.

View attachment 1846

guys please help me solve this circuit. anybody in electronics engineering help.
 

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paulmdrdo said:
Determine the voltage with respect to the ground at each point in figure. Assume the practical model.

View attachment 1846

guys please help me solve this circuit. anybody in electronics engineering help.

Both the diodes are in on state and in this condition the voltage drop on them is $V_{d} \sim .7 V$ no matter which is the current... Kind regards $\chi$ $\sigma$
 
I don't understand. the question is asking for the voltage with respect to the ground.:confused:
 
paulmdrdo said:
I don't understand. the question is asking for the voltage with respect to the ground.:confused:

Let's start with point A.
There is a voltage source between ground and point A.
Its voltage is 25 V.
Therefore the voltage at point A is +25 V.
 
point B is 24.3v. because the voltage drop across the diode is 0.7v so 25-0.7v=24.3 v

but i don't know how to determine the voltage at point c.
 
paulmdrdo said:
point B is 24.3v. because the voltage drop across the diode is 0.7v so 25-0.7v=24.3 v

Good!

but i don't know how to determine the voltage at point c.

Let's do point D first then...
 
but how?:confused:
 
paulmdrdo said:
but how?:confused:

There is a voltage source between ground and point D that determines its voltage.
 

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