What do you call a magnet whose attracove force comes from
What do you call a dosed electric circuit in which the current
divides into tuyo or mare paths before recombining to complete
Electric Science
in terms of seeriaty, what does DC stand for?
Clocene power is typically measured in what units?
What do you call the wire inside an electric bulb?
in terms of electory, what does Ac stand for Hetastis
Electric resistance is typically measured in what units?
2
electric current?
7.
the circuit
9
A device that converts chemical energy into electrical energy.
Electric wining in homes is done in parallel circuit so that if we
Switch off one bulb, the other bulbs continue to glow True
or false
10. What do you call a substance that does not allow electricity to
flow through them with ease?
11. Which word best describes the sudden flow of a very large
current due to the sudden contact of a live and natural wire?
Answers
Answer:
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the centre of the coil. The magnetic field disappears when the current is turned off. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.
A simple electromagnet consisting of a coil of wire wrapped around an iron core. A core of ferromagnetic material like iron serves to increase the magnetic field created.[1] The strength of magnetic field generated is proportional to the amount of current through the winding.[1]
Magnetic field produced by a solenoid (coil of wire). This drawing shows a cross section through the centre of the coil. The crosses are wires in which current is moving into the page; the dots are wires in which current is moving up out of the page.
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.
Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.
Explanation:
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