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What are the advantage and disadvantage piezoelectric loudspeaker compare electric loudspeaker?
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Who is the inventor of the loudspeaker?
Name: Johann Phillip Reis-1st loudspeaker Name: Alexander Graham Bell - Electric loudspeaker
What is piezoelectric crystal?
Piezoelectricity is the property of a material to generate movement from an electric current, and vice versa. A common piezoelectric material is quartz.
What does a loudspeaker use to turn electric energy into sound?
magnets!
What is the advantage and disadvantage of sewing machine?
macchine
Advantage and disadvantage for electric typewriter?
It saves energy It is faster than manual typewriter It has memory It has soft bottons It is portable
What happends when an electric current passed through a piezoelectric crystals?
They physically change shape.
Why is quartz used in piezoelectric transducer?
Quartz is used in piezoelectric transducers because of potential for high voltage input and acoustic power. Quartz is a piezoelectric crystal and when it is mechanically strained or deformed by stress, electric charges appear on some surfaces. When the strain is reversed, the polarity of the charges reverse. This allows vibration of quartz crystals to be transformed into electric pulses.
Are there any materials that undergo strong contraction when an electric current is introduced?
Yes, all piezoelectric materials exhibit the reverse piezoelectric effect. A piezoelectric material is one that generates an electric field or electric potential in response to applied mechanical stress. Therefore, in the reverse case, passing an electric current through the material or an electric potential across the material, will cause it to contract or elongate, depending on the direction of the current. One of the best example of this is lead zirconate titanate which will contract/elongate up to about 0.1% of the original dimensions.
What does the squeezing from pressure do to the rocks crystal grains?
This is called piezoelectric. The pressure causes an electric charge.
How does piezoelectric produce electric current?
When piezoelectricity material is squeezed, it produces electricity. This is the esseantial idea about piezo materials.
What energy does an electric fan use?
In an electric fan electrical energy is transformed into mechanical energy and in loudspeaker the electrical energy is converted into sound energy.
Name three objects that transform electrical energy into other forms?
A toaster An electric fan A loudspeaker
