Question

List at least 5 of uses of electromagnets.

Answer 1

Answer:

A long straight wire (radius = 3.0 mm) carries a constant current distributed uniformly over a cross section perpendicular to the axis of the wire. If the current density is 100 A/m2. The magnitudes of the magnetic field at (a) 2.0 mm from the axis of the wire and (b) 4.0 mm from the axis of the wire is :-

Answer 2

USESES OF electromagnets :-

• Generators, motors, and transformers.
• Electric buzzers and bells.
• Headphones and loudspeakers.
• Relays and valves.
• Data storage devices like VCRs, tape recorders, hard discs, etc.
• Induction cooker.
• Magnetic locks.
• MRI machines.