Exploring Microcontrollers and Circuits

What is a microcontroller?

• A type of large computer used in data centers

• A small computer on a single integrated circuit used to control devices

• A device that only stores data

• A type of battery

Which of the following is an example of an embedded system?

• Desktop computer

• Washing machine control panel

• Television remote control

• Both B and C

What is the main purpose of a resistor in an LED circuit?

• To increase the voltage

• To limit the current flowing through the LED

• To store electrical energy

• To act as a switch

Why is the orientation of an LED important in a circuit?

• LEDs work the same in any direction

• LEDs only allow current to flow in one direction

• LEDs are not affected by orientation

• Orientation only affects the brightness

On a breadboard, which of the following could be reasons why an LED does not light up when the circuit is powered? (Select all that apply)

• The LED is in the wrong orientation

• The circuit is incomplete

• The resistor is missing

• The breadboard is not connected to power

On a breadboard, which of the following could be reasons why an LED does not light up when the circuit is powered? (Select all that apply)

• The LED is in the wrong orientation

• The circuit is incomplete

• The resistor is missing

• The breadboard is not connected to power

Which of the following best describes a breadboard?

• A tool for baking bread

• A board for making temporary electronic circuits without soldering

• A type of microcontroller

• A power supply

What happens if you connect an LED directly to a power source without a resistor?

• The LED will work normally

• The LED may burn out due to too much current

• The LED will be dimmer

• Nothing will happen

What is the function of the long leg (anode) of an LED?

• It connects to the negative side of the circuit

• It connects to the positive side of the circuit

• It is not used

• It acts as a resistor

Which of the following is a correct example of a complete circuit on a breadboard?

• Positive Power Terminal → resistor → LED (anode) → LED (cathode) → ground

• Positive Power Terminal → LED (cathode) → resistor → LED (anode) → ground

• Positive Power Terminal → LED (anode) → ground

• Positive Power Terminal → resistor → ground