Day#7

What type of sound does an active buzzer make?

• Music

• Beep sound without needing a tone signal

• Requires tone() to work

• No sound

Which function is used to play sound on a buzzer in Arduino code?

• buzz()

• playSound()

• tone()

• beep()

What does the tone(pin, frequency) function do?

• Stops the sound

• Plays a tone at given frequency

• Lights an LED

• Changes color

Which Arduino pins support PWM (needed for RGB LEDs)?

• All digital pins

• Only analog pins

• Pins marked with ~ (tilde)

• None

What is the range of PWM values in Arduino?

• 0–10

• 0–100

• 0–1023

• 0–255

An RGB LED has how many pins?

• 2

• 3

• 4

• 5

What is the purpose of resistors in an RGB LED circuit?

• Increase brightness

• Change color

• Limit current to prevent damage

• Turn off the LED

Which combination makes white in an RGB LED?

• Red only

• Green only

• Red + Green + Blue

• Blue only

To make the buzzer play sound continuously in blocks, we use:

• If block

• Repeat loop

• Digital read

• Serial print

In Tinkercad blocks, which values do we use for PWM output?

• True or False

• 1 and 0

• 0 to 255

• 1024