Difficulty: Easy
Correct Answer: True
Explanation:
Introduction / Context:
Units are the language of engineering. Recognizing the correct SI units for common electrical quantities is essential for interpreting datasheets, performing calculations, and communicating results accurately.
Given Data / Assumptions:
Concept / Approach:
In the International System of Units (SI), resistance is measured in ohms, symbol Ω, named after Georg Ohm. Ohm’s law relates voltage, current, and resistance: V = I * R, where V is in volts (V), I in amperes (A), and R in ohms (Ω). This relationship is foundational across electronics and electrical engineering.
Step-by-Step Solution:
Verification / Alternative check:
Dimensional analysis: ohm = volt / ampere. Using base units, Ω = (kg * m^2) / (s^3 * A^2). Textbooks and standards (IEC/ISO) confirm Ω as the SI unit of resistance.
Why Other Options Are Wrong:
Common Pitfalls:
Confusing resistance (Ω) with reactance (also expressed in ohms but frequency-dependent) or confusing resistance with resistivity (Ω·m). Ensure the correct quantity and symbol are applied.
Final Answer:
True
Discussion & Comments