Door bell circuit

Which component emits sound when an electric current passes through it?

• A) Push button

• B) Jumper wires

• C) Buzzer

• D) Arduino UNO

What is the purpose of a buzzer in a doorbell circuit?

• A) To light up

• B) To make connections between components

• C) To produce sound

• D) To measure distance

Which pin of the Arduino UNO is commonly used to connect the positive (anode) leg of a buzzer?

• A) 3

• B) 5

• C) Any Digital pin

• D) 13

Which Arduino function is commonly used to read the state of a digital pin connected to a push button?

• A) analogRead()

• B) digitalWrite()

• C) digitalRead()

• D) pinMode()

What is the primary function of an Arduino UNO in a doorbell circuit?

• A) To generate electricity

• B) To control electronic components

• C) To measure temperature

• D) To play music

How do jumper wires connect components in an electronic circuit?

• A) They transmit signals wirelessly

• B) They provide power to the components

• C) They create a physical connection between components

• D) They act as switches

What happens when the push button is pressed in a doorbell circuit?

• A) The buzzer turns off

• B) The buzzer remains unchanged

• C) The buzzer blinks rapidly

• D) The buzzer produces sound

Which component is used to allow or interrupt the flow of current in a doorbell circuit when pressed?

• A) Jumper wires

• B) Push button

• C) Buzzer

• D) Arduino UNO

How does the push button affect the flow of current in the circuit when it's pressed?

• A) It increases the flow of current

• B) It decreases the flow of current

• C) It interrupts the flow of current

• D) It has no effect on the flow of current

In a doorbell circuit with a push button and buzzer, which pin of the Arduino UNO is typically connected to one side of the push button?

• A) 5V

• B) GND

• C) A0

• D) 3.3V