O-LevelComputer ScienceHardware2210/11 · May/June 2020 · Q64 Marks
Four scenarios are given. Identify the most suitable sensor for each scenario. A different sensor must be used for each scenario. Sensor Scenario Detecting when a person is approaching an automatic door system Monitoring the pollution level in a river Checking if a tropical aquarium is 25 degrees Celsius Counting the number of cars that cross a bridge
- (a)Identify the most suitable sensor for each scenario. A different sensor must be used for each scenario. Sensor Scenario Detecting when a person is approaching an automatic door system Monitoring the pollution level in a river Checking if a tropical aquarium is 25 degrees Celsius Counting the number of cars that cross a bridge[4]
Mark scheme
Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.
- [4] 6 (Table with sensors: Detecting person - Pressure / motion / infra-red; Monitoring pollution - pH / light; Tropical aquarium temp - Temperature; Counting cars - Magnetic field / pressure / motion / infra-red) One mark per each correct sensor (each sensor must be different).
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