Ohm's Law: V = ?

**The reasoning** Ohm's Law states that **voltage (V) is directly proportional to current (I) and resistance (R)**. Think of it like water flowing through a pipe: the voltage is the pressure pushing the water, current is how fast the water flows, and resistance is how narrow the pipe is. The formula is simply: **V = IR** So if a resistor has 5Ω resistance and 2A current flows through it: V = 2 × 5 = 10V This is one of the most fundamental laws in electricity — memorize it like your name! **Why the wrong options tempt you** - **A) I/R** — This actually gives you current when rearranged (I = V/R), but backwards here - **C) I²R** — This is the formula for *power dissipated as heat* (P = I²R), not voltage. Common mix-up! - **D) R/I** — Just scrambling the letters, hoping you're unsure **Quick takeaway** **"Voltage equals current times resistance: V = IR"** — say it until it's automatic. Everything else in circuits builds from this foundation!