Electromagnet definition in basic electricity: A magnet formed by a coil of wire wound around a soft iron or steel core and energized by current is called an electromagnet. Decide whether this statement is accurate.

Introduction / Context:
An electromagnet is a foundational concept in electromagnetism and electric machines. It is created when current flows through a coil (solenoid), generating a magnetic field that is intensified by a ferromagnetic core such as soft iron or certain steels. This question checks recognition of the standard definition used in electronics and physics courses.

Given Data / Assumptions:

• A coil of wire is wound around a soft iron or suitable steel core.
• Current is supplied to the coil from a source (DC or AC).
• No permanent magnet is required; magnetism is current-induced.

Concept / Approach:
When current I passes through a coil of N turns, a magnetomotive force is established: MMF = N * I. A ferromagnetic core provides a low-reluctance path, concentrating flux and increasing field strength. Because the magnetic field exists only while current flows (and scales with it), this assembly is termed an electromagnet, distinct from a permanent magnet that retains magnetization without supply current.

Step-by-Step Solution:

Verification / Alternative check:
Turn current on: the assembly strongly attracts ferrous objects. Turn current off: magnetic effect largely disappears (except minor residual magnetism), confirming electromagnet behavior.

Why Other Options Are Wrong:

• Incorrect: Contradicts the established definition.
• Applies only to AC: DC also creates steady flux; both AC and DC can produce an electromagnet.
• True only with permanent magnets: Not required; the core is ferromagnetic but not permanently magnetized.
• Valid only above 1 A: There is no magic current threshold; effect scales with N * I.

Common Pitfalls:
Confusing permanent magnets with current-driven magnets; assuming steel must be permanently magnetized to be useful as a core; forgetting that soft iron is preferred for easy magnetization and demagnetization.

Final Answer:
Correct