Ohms-Law-The-Fundamental-Prinkkkkkcip.pdf

ye ohms law

1. Ohm's Law: The
Fundamental Principle of
Electrical Circuits
Ohm's Law is a fundamental principle that governs the behavior of electrical
circuits, relating voltage, current, and resistance.
by Menuka Senvidu

2. Who was Georg Ohm?
1
German Physicist
Georg Ohm (1789-1854)
pioneered the study of
electrical circuits.
2
Influential Scientist
Ohm's groundbreaking work
laid the foundation for modern
electrical engineering.
3
Awarded the Copley Medal
Recognized for his seminal contributions to the field of electricity.

3. Ohm's Journey of Discovery
1
Experimentation
Ohm conducted extensive experiments on the flow of
electricity.
2
Mathematical Analysis
He developed a mathematical model to describe his
observations.
3
Publication
In 1827, Ohm published his findings, known as Ohm's Law.

4. The Experiment that Revealed Ohm's Law
Circuit Setup
Ohm used a simple circuit with a battery,
wire, and resistor.
Varied Conditions
He measured the voltage and current
under different resistance values.
Observed Relationship
Ohm discovered the linear relationship
between voltage, current, and resistance.

5. Understanding the Relationship
Between Voltage, Current, and
Resistance
Voltage (V)
Electrical potential difference that drives the flow of current.
Current (I)
The rate of flow of electric charge through a circuit.
Resistance (R)
The opposition to the flow of electric current in a circuit.

6. Applying Ohm's Law to Solve Circuit Problems
1
Given
Identify the known values in the circuit.
2
Substitute
Apply the Ohm's Law equation to find
the unknown.
3
Calculate
Perform the necessary calculations to
solve for the unknown.

7. The Importance of Ohm's Law in
Electrical Engineering
Circuit Analysis
Ohm's Law enables the
understanding and design of
electrical circuits.
Power Calculations
It helps determine power
consumption and efficiency in
electrical systems.
Troubleshooting
Ohm's Law provides a framework
for identifying and resolving
issues.
Teaching Tool
It serves as a fundamental
concept in electrical education.

8. Limitations and Exceptions to
Ohm's Law
1
Non-Ohmic Devices
Some components, like diodes,
do not follow Ohm's Law.
2
High Frequency
Ohm's Law may not apply in
high-frequency circuits due to
capacitive effects.
3
Extreme Conditions
Ohm's Law may break down at very high voltages or currents.

9. Real-World Applications of Ohm's Law
Electronics
Ohm's Law is crucial in the design and
analysis of electronic circuits.
Electrical Appliances
It helps engineers determine the power
requirements and safety considerations.
Power Distribution
Ohm's Law is used to calculate voltage
drops and currents in power grids.

10. Conclusion: The Enduring
Significance of Ohm's Law
1
Fundamental Principle
Ohm's Law remains a
cornerstone of electrical
engineering and physics.
2
Widespread Application
It is applied in a vast array of
electrical and electronic
systems.
3
Continued Relevance
Even with advancements, Ohm's Law maintains its importance and
usefulness.