Which law states that current is directly proportional to voltage and inversely proportional to resistance?

• A. Faraday's Law
• B. Ohm's Law
• C. Kirchhoff's Law
• D. Newton's Law

Answer: (B)

The correct choice is based on Ohm's Law, which defines the relationship between current, voltage, and resistance in an electrical circuit. According to this law, the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. This relationship can be expressed mathematically as V = I × R.

Understanding this principle is fundamental in electrical science because it helps predict how electric circuits behave under different conditions. For example, if the voltage increases and resistance remains constant, the current will also increase. Conversely, if resistance increases while the voltage remains the same, the current will decrease. This straightforward relationship is vital for designing and analyzing electrical systems.

Other laws mentioned do not relate to this specific relationship between voltage, current, and resistance. Faraday's Law pertains to electromagnetic induction, Kirchhoff's Law deals with current and voltage in complex circuits, and Newton's Law relates to motion and forces, thus not applicable to electrical circuitry in this context.