Current flows within electromagnetism. Which law illustrates how magnetic fields are powered by electrical currents?

Current flows within electromagnetism. Which law illustrates how magnetic fields are powered by electrical currents?

• A. Lenz's Law
• B. Ampere's Law
• C. Faraday's Law
• D. Gauss's Law

Answer: (B)

Currents produce magnetic fields, and Ampere's Law formalizes this relationship. It states that the line integral of the magnetic field B around a closed loop equals μ0 times the current that passes through that loop (with the full form including the displacement current term to handle changing electric fields). This directly ties electrical current to the magnetic field it generates, which is exactly what the question is asking. The other laws describe related phenomena: Lenz's Law concerns the direction of induced currents coming from changing flux, Faraday's Law links changing magnetic flux to induced EMF, and Gauss's Law for magnetism deals with the absence of magnetic monopoles and the flux of B through a surface.

Currents produce magnetic fields, and Ampere's Law formalizes this relationship. It states that the line integral of the magnetic field B around a closed loop equals μ0 times the current that passes through that loop (with the full form including the displacement current term to handle changing electric fields). This directly ties electrical current to the magnetic field it generates, which is exactly what the question is asking. The other laws describe related phenomena: Lenz's Law concerns the direction of induced currents coming from changing flux, Faraday's Law links changing magnetic flux to induced EMF, and Gauss's Law for magnetism deals with the absence of magnetic monopoles and the flux of B through a surface.