Thévenin voltage

Tags

• circuitos
• Dividers
• Electronics
• physics
• Electronics formula
• physics formula
• Resistive networks
• thevenin

Detail

Explore the idea

Variables

• $V_i,V_o$voltages (V)
• $R_1,R_2,R_L,R_{\mathrm{Th}}$resistances (Ω)
• $I_T,I_N$currents (A).

Conditions

• Linear resistive DC network; unloaded divider unless RL is stated.

Intuitive explanation

For “Thévenin voltage”: the divider and Thévenin/Norton reduce the network to one port; a load across R2 lowers Vo.

Worked example

Common mistakes

• forgetting that RL sits in parallel with R2
• using the unloaded divider with a load present
• mixing kΩ with Ω

Frequently asked questions

What must be checked before using the Thévenin voltage relation?

Check a resistive DC network, sign references and whether the divider is loaded.

Also known as

• Thévenin
• Thevenin
• Thévenin voltage

Related topics

• Dividers and Thévenin

Conventions

• V, A or Ω according to the left-hand side

Related formulas

• Related

  Wheatstone bridge balance

  $$\frac{R_1}{R_2}=\frac{R_3}{R_4}$$
  Open formulaOpen in section

• Related

  Thévenin resistance

  $$R_{\mathrm{Th}}=\frac{V_{\mathrm{prueba}}}{I_{\mathrm{prueba}}}$$
  Open formulaOpen in section

• Related

  Ohm's law

  $$V=IR$$
  Open formulaOpen in section

• Related

  Resistors in series

  $$R_{\text{eq}}=\sum_iR_i$$
  Open formulaOpen in section