How is the strength of the magnetic field affected by electric current?

The strength of the magnetic field generated around a current-carrying conductor is directly proportional to the amount of electric current flowing through that conductor. As the current increases, it produces a stronger magnetic field. This relationship is described by Ampère's Law, which states that the magnetic field (B) around a conductor is related to the current (I) flowing through it and is often expressed in the formula B ∝ I.

In practical terms, when current flows through a wire, it induces a magnetic field that surrounds the wire. If the current is doubled, the magnetic field strength also doubles, ensuring a consistent relationship between current and magnetic field strength. Thus, the observation that the magnetic field strength increases with increased current is grounded in electromagnetic principles and establishes a fundamental concept in both physics and electrical engineering.