What is Ohm's Law and resistance?

Ohm's Law & Electrical Resistance:

• Ohm's Law Statement: Electric current (I) flowing through a conductor is directly proportional to potential difference (V) across its ends at constant temperature (V = IR).
• Resistance (R): Opposition offered by a conductor to flow of electric current (R = ρ × L / A), measured in Ohms (Ω).
• Factors: Resistance depends on length, cross-sectional area, material resistivity, and temperature.