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Simply, a length of wire, wrapped round to form a coil. Pass electrical current through it and it forms a magnetic field.
The field can be intensified by wrapping the coil around a soft iron core.
Soft iron, is iron that does not easily hold a permanent magnetic field, therefore when the current stops flowing, it ceases to be a magnet. It is an electromagnet. It only becomes a magnet when current flows through the coil.
A practical home experiment. use about 2 metres of bell wire (small, single core with plastic sleeving). Use a 6" nail. Wrap all the wire around the nail leaving a a few inches hanging out at each end.
Connect the wire ends to either side of a large torch battery.
You can now pick up pins. Release the wire and the pins drop.
Use a 6v lantern battery for more power.
DO NOT USE MAINS POWER. or car battery.
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How do generators produce electricity?
generators produce electricity via electromagnetic induction
During electromagnetic blank a changing magnetic field can produce an electric charge?
RADIATION
Why an electromagnetic wave is able to produce both an electric field and a magnetic field because?
The question founders on the rocks of a chicken/egg conundrum. The presence of both an electric field and a magnetic field is required in order to produce an electromagnetic wave.
Can Heavy objects falling in Gravitational fields Produce Electromagnetic fields?
Yes if the moon fell on earth it would definetly produce a noticable magnetic field.
How do you produce a coherent wave?
Coherent waves in the electromagnetic spectrum are produced by masers, for microwaves, and lasers, for light.
What materials are needed to produce electromagnetic power using copper?
something !
What produce electromagnetic radiation?
in physics, electromagnetic radiation occurs when charged particles have forces acting on them to accelerate them. Electrons are responsible for the force needed to create electromagnetic radiation.
When are no electromagnetic waves produce?
In a vacuum
Does walking produce electromagnetic energy?
Walking produces motion, not electromagnetic energy.
What force of two similar ends of magnets produce?
Magnets always produce an electromagnetic force- between the similar ends of magnets it is electromagnetic repulsion.
How do generator's produce electricity?
generators produce electricity via electromagnetic induction
How do generators produce electrity?
generators produce electricity via electromagnetic induction
How do generators produce electricity?
generators produce electricity via electromagnetic induction
What medium is needed for electromagnetic waves?
None is.
Would a vibrating neutron produce electromagnetic wave?
no.
What vibrated to produce electromagnetic waves?
An electric charge.
Do stars produce electromagnetic waves?
Didn't you ever see a star? - Light is a type of electromagnetic wave.
