Loyalty Q2: Quiz on PIR Sensor and LED with Arduino

What is the function of a Passive Infrared Sensor (PIR sensor)?

• Measures visible light radiating from objects

• Measures ultraviolet light radiating from objects

• Measures radio waves radiating from objects

• Measures infrared light radiating from objects

Where are PIR sensors commonly used?

• In digital cameras

• In microwave ovens

• In GPS systems

• In security alarms and automatic lighting applications

What is the average detection range of a PIR sensor for detecting human movement?

• 15m to 20m

• 1m to 3m

• 5m to 12m

• 25m to 30m

How does a PIR sensor detect motion?

• By detecting levels of visible light

• By emitting radio waves

• By emitting ultraviolet light

• By detecting levels of infrared radiation

What are the components required to build a PIR Sensor and LED circuit with Arduino?

• PCB, ICs, Diodes, Inductors, LED, PIR

• Microcontroller, Sensors, Motors, Battery, LED, PIR

• Raspberry Pi, Capacitors, Resistors, Transistors, LED, PIR

• Breadboard, Arduino, Jumper Wires, 220 Ω Resistor, LED, PIR

What is the purpose of connecting the PIR sensor to an Arduino in the project?

• To measure temperature

• To play music

• To detect any movement around the motion sensor

• To control a robotic arm

What does the PIR sensor output when it detects motion?

• Digital signal

• High signal

• Low signal

• Analog signal

What is the role of the 220 Ω resistor in the PIR Sensor and LED circuit?

• To increase the voltage across the LED

• To amplify the signal from the PIR sensor

• To limit the current flowing through the LED

• To decrease the resistance of the LED

How is the PIR sensor connected to the Arduino in the circuit?

• Signal pin to pin 3, ground pin to negative power rail, power pin to positive power rail

• Signal pin to pin 4, ground pin to positive power rail, power pin to negative power rail

• Signal pin to pin 2, ground pin to negative power rail, power pin to positive power rail

• Signal pin to pin 5, ground pin to positive power rail, power pin to negative power rail

What does the void setup in the Arduino code indicate?

• Describes the LED brightness

• Describes the sensor readings

• Describes the loop function

• Describes the configuration of the hardware pins