Which law describes the relationship between voltage, current, and resistance in an electrical circuit?

Question

Question

Answer 1

Correct Answer: Ohm’s law

Rationale:

Ohm's law describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them.
The formula representing Ohm's law is V = I * R, where V is the voltage, I is the current, and R is the resistance.
This fundamental principle is crucial in the field of electrical engineering and physics as it helps in analyzing electrical circuits and understanding how electrical components behave under different voltage and current conditions.

Explanation of Other Options:

Coulomb’s law

Rationale: Coulomb’s law describes the force between two charged objects. It states that the electric force between two charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them. This law is fundamental in electrostatics, not in the context of voltage, current, and resistance in a circuit.

Faraday’s law

Rationale: Faraday's law of electromagnetic induction states that a change in magnetic field within a closed loop of wire induces an electromotive force (EMF) in the wire. This law is crucial in the working of transformers, inductors, and many types of electrical generators and motors, but it does not describe the direct relationship between voltage, current, and resistance.

Newton’s third law

Rationale: Newton's third law states that for every action, there is an equal and opposite reaction. This principle is a fundamental concept in mechanics and describes the interaction of forces between two bodies. It is not related to electrical circuits or the relationship between voltage, current, and resistance.

Conclusion:

Among the given options, Ohm’s law is the correct principle that describes the relationship between voltage, current, and resistance in an electrical circuit. Understanding Ohm’s law is essential for designing and analyzing electrical circuits and for practical applications in electrical engineering.