Ohm's Law

We are given voltage $V=6\text{ V}$ and current $I=2\text{ A}$. We need to find resistance $R$.

To find resistance, use: $R=\frac{V}{I}$

$R=\frac{6}{2}=3\text{ Ω}$

The resistance of the resistor is 3 Ω. Always include the unit (Ω) with your answer.

We need to find resistance given $V=6\text{ V}$ and $I=2\text{ A}$ using $R=V/I$.

12 Ω would result from multiplying $V\times I=6\times 2=12$, which is not the correct formula for resistance. Eliminate this option.

0.33 Ω would result from $I/V=2/6\approx 0.33$, which is the reciprocal of the correct formula. This gives $1/R$, not $R$. Eliminate this option.

8 Ω does not result from any standard rearrangement of Ohm's Law with these values. Eliminate this option.

$R=V/I=6/2=3\text{ Ω}$. The correct answer is 3 Ω.

In Ohm's Law ($V=IR$), the symbol $I$ represents electric current. The symbol comes from the French word intensité.

Electric current is measured in amperes (A), not coulombs. Coulombs (C) are the unit of electric charge, which is a different quantity.

The correct description is electric current, measured in amperes (A).

We need to identify the correct meaning and unit of the symbol $I$ in Ohm's Law.

Coulombs (C) are the unit of electric charge, not current. Current is the rate of flow of charge, measured in amperes. Eliminate this option.

While $I$ does come from the French word intensité, it represents current, not a quantity measured in volts. Volts are the unit of voltage ($V$). Eliminate this option.

Impedance (measured in ohms) is a concept from AC circuits, not the same as $I$ in Ohm's Law. Eliminate this option.

$I$ represents electric current, measured in amperes (A).