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In loudspeakers sound waves are generated by electromagnetic induction.
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Mechanical bell that functions by means of an electromagnet.
This animation demonstrates the mechanism and operation of record players.
Capacitors store electrical energy in the form of electric charge.
This animation explains the most important characteristics of waves through sound waves.
DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.
A dynamo converts mechanical energy into direct current.
Electric current can be generated by rotating an armature loop in a magnetic field.
This animation demonstrates the structure and operation of electron microscopes.
This animation demonstrates the structure and operation of hair dryers.
This animation demonstrates the structure and operation of different types of optical disc drives.
This animation demonstrates how radios work.
The earliest version of the lute appeared in ancient Mesopotamia.
In 1946 a Hungarian scientist was the first person to detect radar echoes from the Moon.
The piano is one of the most popular instruments in the world. It is a chordophone which produces sounds mechanically.
Simple harmonic motion can be considered to be the one-dimensional projection of uniform circular motion.
It is a well-known phenomenon that the sound of an approaching sound source is higher than that of a receding one.
A force can be measured by measuring the twisting of the torsion wire in a torsion balance.
Waves play an extremely important role in many areas of our lives.
A transformer is a device used for converting the voltage of electric current.
When producing sound, the vocal cords are vibrated by the air flowing out of the lung.