What is Ohm’s law?
The voltage across conducting material is directly proportional to the current flowing through the material, provided the physical conditions remains the same.
Power dissipated in the resistor
Limitations of Ohm’s law
•Does not apply to non linear devices like diode and transistors.
•Does not apply to all non-metallic conductors.
•Law is valid for metal conductors only at constant temperature.
Open circuit
Short circuit
References
William H. Hayt , Jack Kemmerly, Steven M. Durbin, “Engineering Circuit Analysis”, eighth edition, Tata McGraw-Hill, 2013.
B. L.. Theraja, “A Textbook of Electrical Technology – Volume I (Basic Electrical Engineering),” S. Chand Limited, 2005.
Muthusubramanian R, Salivahanan S and Muraleedharan K A, “Basic Electrical, Electronics and Computer Engineering”, Tata McGraw Hill, Second Edition, 2006.
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