ITPEC IP October 2025 Question 13
ITPEC IP October 2025 — Question 13 of 100
A is a sensor and B is an actuator — one measures the physical environment and the other changes it.
A receives the rice-field water level and converts that physical quantity into data sent to the IoT server, so A is a sensor. B receives the server's control instruction and physically opens or closes the water gate, so B is an actuator.
Answer (d)
Why not others:
- (a) reverses measurement and physical action and mislabels B as a gateway
- (b) reverses the sensor and actuator roles
- (c) identifies A correctly but a gateway connects or translates networks; it does not operate the gate
Key rule: Sensors convert physical conditions into data; actuators convert control signals into physical action.
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