In the context of resistors and Ohm's law, which symbol and SI unit are used to represent electrical resistance?

• A. $P$ and the watt $\left(W\right)$
• B. $I$ and the ampere $\left(A\right)$
• C. $V$ and the volt $\left(V\right)$
• D. $R$ and the ohm $\left(\Omega \right)$

Answer: (D)

Verified step by step guidance

1. Recall that electrical resistance is a measure of how much a material opposes the flow of electric current.
2. Identify the standard symbol used to represent electrical resistance, which is \(R\).
3. Recognize that the SI unit for electrical resistance is the ohm, symbolized by the Greek letter \(\Omega\).
4. Understand that Ohm's law relates voltage (\(V\)), current (\(I\)), and resistance (\(R\)) through the formula \(V = I \times R\).
5. Therefore, the correct symbol and unit for electrical resistance are \(R\) and the ohm (\(\Omega\)), respectively.