Discovering the Law of Electric Resistance

The question asks to identify the scientist credited with discovering the "Law of Electric Resistance". This law is fundamental to the study of electricity and describes the relationship between voltage, current, and resistance in an electrical circuit.

Understanding the Law of Electric Resistance (Ohm's Law)

The Law of Electric Resistance, more commonly known as Ohm's Law, states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them, provided the temperature and other physical conditions remain unchanged.

Mathematically, Ohm's Law is expressed as:

\( V = IR \)

Where:

• \( V \) is the voltage (potential difference) across the conductor, measured in volts (V).
• \( I \) is the current flowing through the conductor, measured in amperes (A).
• \( R \) is the resistance of the conductor, measured in ohms (\( \Omega \)).

This relationship shows that for a given resistance, increasing the voltage increases the current, and for a given voltage, increasing the resistance decreases the current.

The Scientist Behind the Discovery

The law describing the relationship between voltage, current, and resistance was established by the German physicist Georg Simon Ohm.

• Georg Simon Ohm conducted experiments in the 1820s that led him to formulate this crucial law.
• His work laid the foundation for understanding how current flows through electrical circuits.
• The unit of electrical resistance, the ohm (\( \Omega \)), is named in his honor.

Analyzing the Options

Let's briefly look at the contributions of the other scientists mentioned in the options:

• Charles Coulomb: A French physicist known for formulating Coulomb's Law, which describes the electrostatic interaction between electrically charged particles. His work is fundamental to electrostatics, not directly to the law of electric resistance in a circuit.
• Michael Faraday: An English scientist who made significant contributions to the study of electromagnetism and electrochemistry. He discovered electromagnetic induction, the principles behind the electric motor, and electrolysis. While crucial to electricity and magnetism, his primary discoveries are not the law of electric resistance.
• G.S. Ohm: As discussed, Georg Simon Ohm is the scientist who discovered and formulated the law relating voltage, current, and resistance, known as Ohm's Law or the Law of Electric Resistance.

Based on the historical contributions to physics, G.S. Ohm is the scientist who discovered the law of electric resistance.

Conclusion

The scientist who discovered the Law of Electric Resistance is G.S. Ohm.

Revision Table: Key Electrical Laws and Discoverers

Additional Information: Significance of Ohm's Law

Ohm's Law is a cornerstone of electrical engineering and circuit analysis. It is used extensively to design and troubleshoot electrical circuits. While \( V=IR \) is the most basic form, it applies to resistive components under specific conditions. For complex circuits, Ohm's law is often used in conjunction with Kirchhoff's laws (Kirchhoff's Current Law and Kirchhoff's Voltage Law) for more comprehensive analysis.