Sensors - ICT IGCSE

What is the definition of a sensor?

• A device that automatically inputs data into a computer system

• A device that manually inputs data into a computer system

• A device that converts digital data to analogue data

• A device that measures the speed of a computer system

What type of data do sensors detect?

• Data that is not useful for computers

• Data that is only digital

• Static and unmeasurable data

• Constantly changing and measurable data

What is the purpose of an Analogue to Digital Converter (ADC) in relation to sensors?

• To increase the speed of data input into a computer

• To convert digital data to analogue data for sensors to understand

• To convert analogue data to digital data for computers to understand

• To measure the accuracy of sensors

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

• Thermometer

• Infrared burglar alarm

• Pressure sensor

• Sound sensor

What is the main advantage of using sensors for data collection?

• Sensors can only be used by humans

• Sensors are slow in responding to information

• Sensors can monitor information constantly

• Sensors are not accurate

What can faulty sensors potentially cause?

• Incorrect results

• Better data collection

• Increased accuracy

• Faster data processing

In what type of applications are sensors commonly used?

• Gaming applications

• Social media applications

• Monitoring and control applications

• Entertainment applications

What is the purpose of using sensors in burglar alarms?

• To measure air pollution

• To control the temperature

• To play music

• To detect intruders automatically

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

• Light sensor

• Humidity sensor

• Temperature sensor

• Pressure sensor

What is the main disadvantage of using sensors?

• Sensors are not used for data collection

• Sensors are always accurate

• Sensors are slow in responding to information

• Faulty sensors can give incorrect results