[amp_mcq option1=”piezoelectric device” option2=”solar cell” option3=”photodiode” option4=”nicad cell E. None of the above” correct=”option1″]
The correct answer is A. piezoelectric device.
A piezoelectric device is a device that converts mechanical pressure to electrical energy. The word “piezoelectric” comes from the Greek words “piezein”, meaning “to press”, and “elektron”, meaning “amber”. Amber is a fossilized tree resin that has the property of becoming electrically charged when rubbed.
Piezoelectric devices are used in a variety of applications, including microphones, loudspeakers, and sensors. They are also used in some types of energy harvesting devices, which can convert ambient energy, such as vibration or sound, into electrical energy.
Option B, solar cell, is a device that converts sunlight into electrical energy. Solar cells are made of semiconductor materials, such as silicon, that absorb sunlight and create an electric current. Solar cells are used in a variety of applications, including solar panels, which can be used to generate electricity for homes and businesses.
Option C, photodiode, is a semiconductor device that converts light into an electrical signal. Photodiodes are used in a variety of applications, including optical communication, light detection, and solar cells.
Option D, nicad cell, is a type of rechargeable battery. Nicad cells are made of nickel and cadmium, and they are used in a variety of applications, including power tools, cordless phones, and cameras.
Option E, None of the above, is not the correct answer.