Robotics Mid-term Assessment Grade VII

What is the purpose of the IR sensor in the burglar alarm circuit?

• To produce sound when motion is detected

• To detect motion or objects in front of it

• To provide power to the Arduino

• To light up when the alarm is triggered

Which pin of the IR sensor is connected to the digital pin on the Arduino for reading input?

• VCC

• GND

• OUT

• Analog

What happens when the IR sensor detects an object in the burglar alarm circuit?

• The Arduino powers off

• The buzzer produces a sound

• The IR sensor turns off

• The Arduino stops working

What is the role of the Arduino in the burglar alarm system?

• It acts as the power source for the circuit

• It processes the IR sensor signal and controls the buzzer

• It detects the motion directly without any sensor

• It amplifies the buzzer sound

Which of the following components is an output device in this circuit?

• IR sensor

• Buzzer

• Arduino

• Jumper Wires

If the IR sensor is not detecting motion, what should the buzzer do?

• Produce a continuous beep

• Stay silent

• Blink rapidly

• Produce a soft hum

What does the digitalWrite() function do?

• Reads the state of a pin

• Sends a signal to a pin (HIGH or LOW)

• Checks the status of the microcontroller

• None of the above

What will happen if digitalWrite(13, LOW) is executed?

• The connected LED will turn on

• The connected LED will turn off

• The connected buzzer will sound

• None of the above

Which pin mode should be used to read the state of a button/sensor?

• OUTPUT

• INPUT

• ANALOG

• PWM

What is the purpose of the pinMode() function in Arduino programming?

• To read the state of a pin

• To set a pin as input or output

• To send a signal to a pin

• To initialize serial communication