Quiz on micro:bit 1

Which component on the micro:bit is responsible for detecting motion such as shaking?

• Accelerometer

• Processor

• Microphone

• Speaker

In the loop "for x in range(0,5):", how many times will the loop execute?

• 5 times

• 4 times

• 6 times

• 3 times

What type of signal is a digital signal?

• Continuous

• On or off

• Variable

• Analog

What does a digital signal represent in a computer system?

• 2 or 3

• 1 or 0

• 5 or 6

• 7 or 8

In the function write_analog(value), what is the range of values that can be used to set the duty cycle?

• 0 to 512

• 0 to 1023

• 1 to 1000

• 0 to 255

Which function is used to check if a button was pressed since the micro:bit was powered on?

• is_pressed()

• was_pressed()

• has_pressed()

• pressed()

What does the is_pressed() function do?

• Checks if a button was pressed at any time

• Checks if a button is currently being pressed

• Checks if a button was pressed twice

• Checks if a button is not pressed

What does the duty cycle in a PWM signal represent when controlling a servo motor?

• The resistance of the servo

• The frequency of the signal

• The angle the servo motor should turn to

• The voltage of the signal

If a PWM signal has a period of 20 ms and the pulse is high for 10 ms, what is the duty cycle?

• 7.5%

• 75%

• 15%

• 50%

Which statement best describes how PWM (Pulse Width Modulation) works on micro:bit to control things like how bright an LED is or how fast a motor spins?

• PWM changes the output voltage on the pin smoothly, like a dimmer switch.

• The pins on the board can make any voltage between 0V and 3.3V

• PWM turns the full voltage (like 3.3V) ON and OFF very quickly, changing how long it stays ON

• PWM is mainly used to make music louder, like a speaker.