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18 Questions

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Piezoelectric Effect Quiz

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Questions and Answers

What is the voltage produced by a 1 cm3 cube of quartz with 2 kN of correctly applied force?

12500 V (correct)

25000 V

5000 V

1000 V

What is the change in P related to in piezoelectric materials?

Shift in the crystal's dipole moment direction

Change in the bulk's crystal structure

Variation of electric field between the crystal faces

Alteration of the crystal's surface charge density (correct)

What is the converse piezoelectric effect?

The change in dipole moment direction in the crystal

The variation of electric field between the crystal faces

The creation of mechanical deformation in the crystal due to an electrical field (correct)

The transformation of mechanical energy into electrical energy

What is a unique property of piezoelectric materials?

Transforming mechanical energy into electrical energy, and vice versa Signup and view all the answers

What is one of the most interesting applications of piezoelectric materials?

Energy harvesting Signup and view all the answers

What is the primary function of a solar cell?

To transform light energy into electrical energy Signup and view all the answers

Why do we measure the voltage across the capacitor in piezoelectric generators?

To ensure the generator is working Signup and view all the answers

What is a significant advantage of piezoelectric generators?

They have a high power density Signup and view all the answers

What affects the efficiency of energy conversion in piezoelectric generators?

The frequency and amplitude of the mechanical vibrations Signup and view all the answers

What is being researched for piezoelectric generators?

Improving their efficiency and scalability Signup and view all the answers

What is the characteristic of a photoelectric cell?

Its electrical characteristics change when exposed to light Signup and view all the answers

What is a potential future application of piezoelectric generators?

Powering small electronic devices in remote locations Signup and view all the answers

What is the basic form of a solar cell?

A p-n junction diode Signup and view all the answers

What is formed when individual solar cells are combined?

A solar panel Signup and view all the answers

What is crucial to consider when designing piezoelectric generators?

The frequency of the mechanical vibrations Signup and view all the answers

What type of energy is converted into electrical energy by a solar cell?

Light energy Signup and view all the answers

What is an example of a device that uses the photovoltaic effect?

A solar cell Signup and view all the answers

Why is understanding the principles of piezoelectric generators important?

To optimize their performance and explore new possibilities in energy harvesting Signup and view all the answers