Who introduced the concept of electrical resistance in 1827?

Who introduced the concept of electrical resistance in 1827?

• A. Georg Ohm
• B. James Clerk Maxwell
• C. Alessandro Volta
• D. Michael Faraday

Answer: (A)

Understanding how resistance links voltage and current. Georg Ohm, in 1827, showed through careful experiments that the current through a conductor is proportional to the voltage across it, with a constant of proportionality that depends on the material, temperature, and geometry. That constant is the resistance. From this, Ohm derived the relationship V = IR and established the ohm as the unit of resistance. Maxwell, Volta, and Faraday made foundational contributions in electromagnetism, electrochemistry, and induction, but the formal introduction of electrical resistance as a defined quantity and the law connecting V, I, and R came from Ohm in that period.

Understanding how resistance links voltage and current. Georg Ohm, in 1827, showed through careful experiments that the current through a conductor is proportional to the voltage across it, with a constant of proportionality that depends on the material, temperature, and geometry. That constant is the resistance. From this, Ohm derived the relationship V = IR and established the ohm as the unit of resistance. Maxwell, Volta, and Faraday made foundational contributions in electromagnetism, electrochemistry, and induction, but the formal introduction of electrical resistance as a defined quantity and the law connecting V, I, and R came from Ohm in that period.