PWM_2

PWM stand for

• pulse-width modulation

• pulse with modem

• pulse wide moderation

• priority width modulation

A period of a pulse consists of an ON cycle and an OFF cycle . The fraction for which the signal is ON over a period is known as a ________.

• Frequency

• Duty cycle

• PWM

• ADC

A PWM pulse with a period of 10ms will remain ON (high) for 6ms. How much the duty cycle will be

• 40%

• 20%

• 60%

• 100%

The ________of a signal determines how fast the PWM completes a cycle  which means how fast it switches between ON (high) and OFF (low) state

• Duty cycle

• Frequency

• Time period

• Amplitude

A peak value of pulsed DC signal is 12V, What would be the average voltage of 25% duty cycle?

• 9V

• 6V

• 3V

• 12V

What are the applications of PWM?

• Controlling motor speed

• controlling the street light intensity

• voltage regulation

• all of the above

How can we read an analog input in Arduino?

• analogRead(1);

• analogWrite(A1);

• digitalRead(A1);

• analogRead(A1);

PWM technique is accurate and has a _______ response time.

• high

• slow

• fast

• low

Which is not the advantage of PWM?

• prevents overheating of LED while maintaining its brightness

• provides a high input power factor

• accurate and has a fast response time

• switching losses are considerably high

What is a period of 100 Hz PWM signal?

• 1 seconds

• 0.01 seconds

• 0.1 seconds

• 0.001 seconds