What is the principle behind a piezoresistive pressure sensor?
A. Pressure causes a change in capacitance of a thin metal film.
B. Pressure causes a change in the magnetic field of a coil.
C. Pressure causes a change in the resistance of a semiconductor material.
D. Pressure causes a change in the refractive index of a fiber optic cable.
Answer:C
What is the principle behind a piezoresistive pressure sensor?
A. Pressure causes a change in capacitance of a thin metal film. B. Pressure causes a change in the magnetic field of a coil. C. Pressure causes a change in the resistance of a semiconductor material. D. Pressure causes a change in the refractive index of a fiber optic cable.
Explanation: A piezoresistive pressure sensor is a type of pressure sensor that works by measuring the change in resistance of a semiconductor material under pressure. When pressure is applied to the sensor, it causes a deformation in the material, which in turn causes a change in the resistance of the material. This change in resistance can be measured and used to calculate the pressure being applied to the sensor. Piezoresistive pressure sensors are commonly used in applications where high accuracy and stability are required, such as in the automotive and aerospace industries.