Special Quiz -Arduino

What is the main purpose of using a 4 channel relay in controlling a DC motor in an Arduino?

• To provide power to the motor

• To control the speed of the motor

• To switch the motor on and off

• To reverse the direction of the motor

How many channels does a 4 channel relay have?

• 2

• 3

• 4

• 5

What type of motor can be controlled using a 4 channel relay in an Arduino?

• AC motor

• DC motor

• Stepper motor

• All of the above

How many wires are required to connect a DC motor to a 4 channel relay in an Arduino?

• 2

• 3

• 4

• 5

What is the function of a transistor in a DC motor control circuit using a 4 channel relay in an Arduino?

• To amplify the current

• To control the speed of the motor

• To switch the motor on and off

• To protect the relay from overcurrent

How many pins of the Arduino board are used to control a 4 channel relay?

• 2

• 3

• 4

• 5

What is the difference between a normally open (NO) and normally closed (NC) relay?

• The number of channels

• The voltage rating

• The current rating

• The state of the contacts when the relay is not activated

What is the advantage of using a 4 channel relay over a single channel relay?

• Higher current rating

• Lower cost

• Ability to control multiple devices

• Smaller size

How do you write code in Arduino to control a DC motor using a 4 channel relay?

• Using the analogWrite() function

• Using the digitalWrite() function

• Using the analogRead() function

• Using the serialPrint() function

What is the L293d motor shield driver used for in an Arduino?

• To control the speed of the motor

• To provide power to the motor

• To switch the motor on and off

• To reverse the direction of the motor