Interfacing of the Relay with Arduino

Q1. Which component of a relay module is typically connected to the digital output pins of an Arduino microcontroller?

a) Coil

b) Contacts

c) Armature

d) Terminals

Q2.Which type of relay contact is commonly used to control a circuit when the relay is energized?

a) Normally open (NO)

b) Normally closed (NC)

c) Changeover (CO)

d) Both NO and NC

a) To decrease the complexity of circuits

b) To improve the processing speed of Arduino

c) To amplify the electrical signals

d) To enable remote control and automation of electrical devices

Q4. What is the function of the armature in a relay?

a) To generate a magnetic field

b) To provide mechanical support

c) To move the contacts

d) To protect the coil

Q5. Which Arduino function is typically used to control the digital pins connected to the relay module?

a) analogRead()

b) digitalWrite()

c) analogWrite()

d) pulseIn()