Magnet: The permanent magnet at the back of the speaker. This is the heaviest part of an earbud and makes up the vast majority of its weight. Coil: This becomes an electromagnet whenelectricityflows through it. Transparent plastic cone: This makes the sound when it moves. Sponsored links How...
A galvanometer is a measuring instrument that uses an electromagnet to measure electric current. A galvanometer is an absolute instrument; it measures the electric current in terms of a tangent of deflection angle. A galvanometer can measure the electric current directly, but this involves breaking...
What creates the magnetic field in an electromagnet? What causes Earth's magnetic field? What affects the strength of a magnetic field? What affects magnetic field strength? What creates a magnetic field? When does a magnet lose its magnetism? What is induced magnetism? Why do magnets repel ea...
Explain how does the rotation of the Earth makes a body weigh more at the poles than at the equator. Give at least three reasons why optical interferometry is more complicated than radio astronomy. What are the uses of each electromagnet wave?
Once a head arrives at a certain location on a platter, an electromagnet produces a magnetic field, which aligns data-carrying domains in the underlying track. Each domain can be aligned in one of two possible directions — 1 or 0. As these alignments change, they form patterns that ...
While the strength of permanent magnets depends on the type of material that makes them up, an electromagnet's strength depends on the amount of current that flows through it. Permanent magnets can lose their magnetic properties such as their ability to give off a magnetic field when they're ...
Anelectromagnet, surrounded by a naturalmagnet, attached to the cone When you play music, an electric current flows back and forth through the electromagnet, which causes it to move in and out. This pushes and pulls the attached cone, forming air pressure fluctuations in the surrounding air. ...
Having the electromagnet in the center of the motor makes it harder to cool. The use of brushes puts a limit on how many poles the armature can have. Brushless DC Motors The poles on the stator of a two-phase BLDC motor used to power a computer cooling fan. The rotor has been remov...
south, the atom becomes magnetic. And because electrons rotate or spin around the nucleus of an atom, it also is possible for an atom to possess a magnetic field when the poles aren't all in alignment due to the electrons' spinning, which makes the atom much like an electromagnet. ...
When the injector is energized, an electromagnet moves a plunger that opens the valve, allowing the pressurized fuel to squirt out through a tiny nozzle. The nozzle is designed to atomize the fuel — to make as fine a mist as possible so that it can burn easily. The amount of fuel suppl...