Electronics Components Quiz

Which pin on the L7805 voltage regulator is the output pin?

• Pin 1

• Pin 2

• Pin 3

• Pin 4

What does the common pin on a slide switch connect to in a circuit?

• Ground

• Output Load
  

• Microcontroller Reset

• Battery

On a typical LED, which leg is the positive terminal?

• The longer leg

• The shorter leg

• The thicker leg

• The leg connected to GND

What the type of push button is shown in the figure?

• Floating

• Active low

• Active high

• short

Which pin configuration on the L293D makes the motor turn right(Clockwise)?

• S2 and S3 closed

• S1 and S3 closed

• S1 and S4 closed

• None closed

What is the purpose of the capacitors on the input and output of the L7805 regulator?

• Filter voltage ripple

• Boost voltage

• Reverse polarity protection

• Act as load

Which pins on the ESP32-C3 Supermini are used for I2C communication?

• TX and RX

• A0 and A1

• MISO and MOSI

• SDA (Pin 8) and SCL (Pin 9)

What is the recommended voltage level for powering the ESP32-C3 Supermini via its 5V pin?

• 12V

• 5V regulated

• 3.3V only

• 7.4V

What is the correct connection order for a typical LED circuit with a current-limiting resistor and GPIO pin?

• GPIO → LED anode → cathode → resistor

• GPIO → LED anode → cathode → resistor → GND

• GPIO → LED cathode → anode → resistor → GND

• GPIO → GND → LED → resistor

What happens if you connect both the input and output of an L7805 voltage regulator directly together?

• It boosts the voltage to 12V

• It disables short-circuit protection

• It causes a short circuit and may damage the regulator

• It improves voltage stability