How do I find Thevenin resistance?

Zero all independent sources (replace voltage sources with shorts, current sources with opens). Then calculate resistance between the terminals. For circuits with dependent sources, use test source method: R_th = V_test/I_test.

What is maximum power transfer theorem?

Maximum power is delivered to load when R_L = R_th (load resistance equals Thevenin resistance). P_max = V_th²/(4R_th). Important in RF circuits and audio amplifiers for matching.

When is Thevenin theorem most useful?

Thevenin is useful when multiple load conditions must be analyzed for one source circuit. Calculate V_th and R_th once, then quickly find I_L and V_L for any R_L without full circuit re-analysis.

Thevenin Equivalent Circuit Calculator

Find Thevenin equivalent: V_th = open-circuit voltage, R_th = resistance seen at terminals with sources zeroed. Maximum power transfer: R_L = R_th. Calculate short-circuit current I_sc = V_th/R_th.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Find Thevenin equivalent: V_th = open-circuit voltage, R_th = resistance seen at terminals with sources zeroed. Maximum power transfer: R_L = R_th. Calculate short-circuit current I_sc = V_th/R_th. Use the thevenin result to inform your clinical assessment.

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Thevenin Equivalent Circuit Calculator

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Frequently Asked Questions

How do I find Thevenin resistance?

What is maximum power transfer theorem?

When is Thevenin theorem most useful?