Question

Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When current flow is interrupted in a DC motor, which motor property causes a reverse voltage spike? a. Resistance b. Capacitance C. Inductance d. None of the above Q3. Which Arduino internal circuit is used to control motor speed? a. Digital to Analog Converter (DAC) b. Analog to Digital Converter (ADC) c. Pulse Width Modulation (PWM) d. None of the above Q4. What range of PWM duty cycle (%) values correspond to O-255 output values in the analogWrite() function? a, 0 100 b. 0 255 C. 100 255 d. 0 102:3 Q5. On Arduino UNO board the 6 PWM output pins work with which function? a. analogWrite) b. analogRead() c. Serial.print() d. All of the above It has its own micro-controller circuit to control its operation

answere

Answer 1

1 answer:

Option: B is correct (Digital)

Explanation:

• Controlling the speed of a DC motor by means of a micro-controller, is Digital kind of control, Digital controlling type in case of interfacing with DC motor by means of a micro-controller, is base on Pulse Width lilt technique.
• The DC motor is an electrical machine with a rotating part termed as a rotor which has to be controlled.
• For example, consider the DC motor whose speed or direction of rotation of DC motor can be controlled using programming techniques which can be achieve by interfacing with 8051 micro-controller.

2 Answers:

Option: C is correct (Inductance)

Explanation:

• as soon as current flow is interrupted in a DC motor, Inductive motor property cause a reverse voltage spike

3 Answers:

Option: C is correct (Pulse width modulation)

Explanation:

• Pulse Width Modulation (P W M) is used to control the speed of the motor.

4 Answer:

Option: B is correct. (0-255)

Explanation:

• The range of 0 (0 v) -255 (5 V) PWM  duty cycle (%) values communicate to 0 -255 output values in the analog write () function