What is the primary function of a sensor?

• To convert energy from one domain to another

• To detect physical inputs and convert them into electrical signals

• To store data for processing

• To amplify electrical signals

Which of the following is a characteristic of a transducer?

• It can only function as a sensor

• It transforms energy from one domain into another

• It is always reversible

• It does not require any power source

What type of sensor uses resistance changes to measure physical quantities?

• Physical sensor

• Radioactive sensor

• Biological sensor

• Chemical sensor

What is the difference between active and passive sensors?

• Passive sensors can only measure pressure

• Passive sensors are more accurate than active sensors

• Active sensors can only measure temperature

• Active sensors require an external power source, while passive sensors do not

Which of the following is an example of a digital sensor?

• Pressure gauge

• Encoder

• Thermocouple

• Accelerometer

What does the term 'sensitivity' refer to in the context of sensors?

• The ability to detect small changes in input

• The time it takes for a sensor to respond

• The range of input values a sensor can measure

• The accuracy of the sensor's output

What is the purpose of signal conditioning?

• To convert analog signals to digital signals

• To amplify the output of a sensor

• To store data for future use

• To manipulate an analog signal to meet processing requirements

Which type of filter allows all frequencies below a certain cutoff frequency to pass?

• Band-stop filter

• Low-pass filter

• Band-pass filter

• High-pass filter

What is the primary function of a Wheatstone bridge?

• To convert analog signals to digital

• To filter noise from signals

• To measure unknown resistances

• To amplify signals

What is the main advantage of digital signal processing over analog?

• Lower power consumption

• Higher noise immunity

• Simpler implementation

• Less expensive