If a wire is wrapped around an iron core and current is passed, the iron becomes magnetized due to which effect?

• A. Electromagnetic Induction
• B. DC
• C. Physiological Effect
• D. Magnetic Effect

Answer: (D)

When current flows through a wire wrapped around an iron core, it creates a magnetic field that passes through the iron. This external magnetic field causes the iron’s magnetic domains to align with the field, turning the iron into a magnet. That tendency to become magnetized due to the current’s magnetic field is the magnetic effect. Electromagnetic induction would require a changing magnetic flux to generate voltage, which isn’t the process here, and the other options don’t describe the magnetization of the iron.