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Magnetism Real-life Applications - Coggle Diagram
Magnetism Real-life Applications
Detection
Magnetometer
Also used by astronomers to detect strength and direction of magnetic fields around Earth and other bodies in space
Most prominent one used in astronomical is on Galileo craft which launched in 1989
Principle of magnetometers used at security ts more simpler because it merely detects presence of magnetic field
Machine to detect strength of magnetic field like burglar alarm or others detector used for security
It has magnetometer for measuring Jupiter's magnetosphere and its surrounding asteroids and moons
MRI
The machine the beams a radio signal at the same frequency of atoms in the cell
When shutting off the radio signal and magnetic field, the atoms emits burst of energy absorbed from the radio waves
A powerful magnetic field is activated which causes the atoms within the patient's body to spin at a precise frequencies
Then the computer will scan the body and translate these in 3D images for diagnosis
Allows doctors to make intensive diagnosis without invading patient's body
Compass
A simple magnetic instrument
MAGLEV Trains
The used of superconductivity comes at low temperatures which facilitate the transfer of electrical current through a conducting material with no resistance
Idea of MAGLEV trains started in 1907, when Robert Goddard describe a vehicle that traveled by means of magnetic levitation
An electromagnet can create a powerful magnetic field if used properly, thus exert enough repulsive force to lift extremely heavy objects
Projecting Sound
Microphones
Current flow back and forth between diaphragm and positive plate of capacitor, thus producing alternating current which travels through a mixer and amplified to a speaker
Contains capacitor, when the negatively charged plate is hit by sound waves, it vibrates at same frequency as those waves
Loudspeaker
As it enters the coil, this current induces an alternating magnetic field which causes the coil to vibrate
Then it vibrates the diaphragm and later reproduces sound
Current enters speaker from microphone, alternating at same frequency as the sound source
Contain circular permanent magnet surrounding an electrical coil attached to a cone-shape diaphragm
Car Horns
When the horn is pressed, it in turn depresses an iron bar that passes through an electromagnet surrounded by wires from car's battery
Then causing diaphragm to vibrate and produce sound that is magnified greatly
Use magnetism to create sound from vibrations
Electric Bells
The hammer then strikes the bell that pushes the armature away from the electromagnet but the spring forces the armature back against the electromagnet
The cycle continues as long as the button is pressed
Then its generate magnetic field, drawing it towards an iron armature attached to a hammer
The electric bells is connected to a power supply which sends current flowing through a spring surrounding and electromagnet
Recording and Reading Data
Records and tapes
The strength of current affects the recording head, a small electromagnet whose magnetic field extends over section of tape being recorded
Loud sound produce strong magnetic fields and soft ones weak fields
Tape and stereo master have almost the same principle
Create a metal master record disk by cutting head that responded to vibrations from master tape
Disk drives
Two electric motors
Disk motor, rotates the disk at high speed
Head motor: moves computer's read-write head across the disk
Third motor is stepper motor: ensure the drive turns at a precise speed rate
It acts as gears to regulate drives speed
Stepper motor contains a cylindrical shape permanent magnet that send signals to rows of metal teeth surrounding it