Which law quantifies the relationship between resistance, voltage, and current?
Show answer & explanation
Correct answer: B
Explanation
Solution: The correct answer is Ohm's Law.
Explanation:
☛ Ohm's Law states that the electric current flowing through a conductor is directly proportional to the potential difference (voltage) applied across its ends, provided physical conditions like temperature remain constant.
☛ The mathematical formula for this relationship is V = I × R, where V represents voltage, I represents current, and R is the constant of proportionality known as electrical resistance.
☛ This fundamental law of electricity was formulated by German physicist and mathematician Georg Simon Ohm in 1827.
Extra Exam-Relevant Facts:
☛ The SI unit of electrical resistance is the Ohm (Ω), named in honour of Georg Simon Ohm.
☛ Boyle's Law: States that at constant temperature, the pressure of a given mass of an ideal gas is inversely proportional to its volume (P ∝ 1/V).
☛ Hooke's Law: States that within the elastic limit, the strain produced in a body is directly proportional to the stress applied to it (Stress ∝ Strain).
☛ Newton's Third Law: States that to every action, there is always an equal and opposite reaction.
Important One-Liners for Upcoming Exams:
☛ What is the SI unit of electric current? → Ampere (A)
☛ What is the SI unit of electric potential difference (voltage)? → Volt (V)
☛ Which device is used to measure electrical resistance? → Ohmmeter
☛ Which instrument is connected in series in a circuit to measure current? → Ammeter
☛ What is the reciprocal of electrical resistance called? → Electrical Conductance (SI unit: Siemens)