# data[].attributes.body
A fan run by electricity
When the switch if the fan is turned on, electric current frolics though the closed circuit. The electric motor in the fan has many magnets. The motor contains an electromagnet that is connected to a shaft. When current flows through the motor, the electromagnet rotates, causing the shaft to rotate as well. The rotating shaft moves other parts of the device, the rotating shaft turns the blades of the fan.

# data[].attributes.body
Electromagnet : a magnet in which the magnetic field is produced by electric current ( the magnet is temporary )

Magnetic  field :

varies with the number of coils / amount of current

(The material itself has magnetic domains but they are not arranged in the same direction. When current passes through the coils, the electric domains are forced to face the same direction. )

Magnetic field : a region around a magnet where there is magnetic force

How does a fan works?  inside of appliances such as a fan or egg beater, there is a motor that causes to fan blade or beaters to spin.  There is usually a permanent and electromagnet in a motor.  When the switch is turned on, the circuit is closed, current flows and the electromagnet ( in the middle ) is magnetised. It’s poles changes constantly because of the commutator.  This allows the electromagnet magnet to  have the same poles as the permanent magnets on the side and spin smoothly. The fan captures the spinning motion and its transferred to the blade, causing the blades of the fan to spin.

# data[].attributes.body
Maglev Train:
When the switch is pushed, the circuit closes and there would be an electric current that flows through the coil, making the coil an electromagnet. Hence, the electromagnet and the magnets that are on the sides of the train cabin would be like poles, hence, repelling each other and ensuring that the Maglev Train would not bump into the sides, making it safer for the commuters.
Additionally, the magnets at the bottom of the train cabins and the electromagnets that are on the track would be like poles, repelling each other causing a electromagnetic force, ensuring that the train would not touch the tracks, and move quickly and efficiently to the next destination.

# data[].attributes.body
the needle of a compass is a tiny magnet, which points in north-south direction. When we bring a magnet close to it, the needle gets deflected. The compass needle gets deflected when the current flows in a nearby wire. So, when electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of the electric current.

# data[].attributes.body
Loudspeakers use the magnetic effect of an electric current to work. When the switch is turned on, a closed circuit is formed and electricity turns an iron bar with wires coiled around it in the speaker into an electromagnet, enabling it to attract and repel magnets. The iron bar has a cone attached to it. The iron bar is then attracted and repelled by the permanent magnet repeatedly, which also moves the cone, thus creating vibrations which are also known as sound.

# data[].attributes.body
Vacuum cleaners have an electric motor that runs by magnetism. Inside the motor, wire coils produce repelling forces when electric current flows through them. The forces make the motor spin. Unlike refrigerator magnets, which use no power, the magnetic coils in the motor have no magnetism when the vacuum cleaner is turned off.

# data[].attributes.body
In Maglev trains, superconducting magnets suspend a train car above a U-shaped concrete guideway. Like ordinary magnets, these magnets repel one another when matching poles face each other. ... Here, both magnetic attraction and repulsion are used to move the traincar along the guideway.

# data[].attributes.body
Application of electromagnet: Buzzer
When we pressed the button of the buzzer, the circuit is closed , thus forming an electromagnet. The electromagnet is magnetised so it pulled up on the contact arm.This breaks the buzzer circuit which shuts off the electromagnet ,causing the contact arm to fall down, closing the circuit again and this process repeats.Thus the buzzing noise we hear is the sound of the rapidly moving arm hitting the magnet and the stationary contact dozens of times a second.

# data[].attributes.body
Example of magnetic effect of a current: Electric bell .
Step 1:  When you press the switch of the bell, the current passes through the circuit.
Step 2: The electromagnet pulls the springy iron strip S which forms one terminal of the switch T.
Step 3: As the strip moves towards the electromagnet, its contact with the switch is lost. This breaks the circuit.
Step 4: As a result, the electromagnet stops attracting the strip. The strip goes back to its original position (due to spring) and it's contact with the switch is re-established.
Step 5:This backward and forward movement of the iron strip takes place many a times in a second and produces sound.
Step 6:The loudness of the sound may be enhanced with the help of a hammer attached to the strip S which in turn strikes the gong G.