Exercises: Ohm's Law

The rate of charge flow: $I = \Delta Q / \Delta t$

The energy transferred per unit charge: $I = W / Q$

The opposition to charge flow through a material.

The potential difference between two points: $I = V_A - V_B$

From the positive terminal to the negative terminal (from high to low potential).

From the negative terminal to the positive terminal (from low to high potential).

In the same direction as electron flow.

Conventional current has no defined direction — it depends on the circuit.

Resistance is the opposition to current flow; it converts electrical energy to heat.

Resistance drives current — higher resistance means more current.

Resistance is the same as voltage.

Resistance only exists in insulators, not in conductors.

$10\ \text{V}$

$0.025\ \text{V}$

$40\ \text{V}$

$2.5\ \text{V}$