Pulse-Width Modulation (PWM) Mode - MCQs with answers

Pulse-Width Modulation (PWM) Mode - MCQs with answers

1. Why are the pulse width modulated outputs required in most of the applications?

a. To control average value of an input variables
b. To control average value of output variables
c. Both a & b
d. None of the above

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2. What would be the resolution value if oscillator and PWM frequencies are 16MHz and 2 MHz respectively?

a. 2
b. 3
c. 4
d. 8

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3. How do the variations in an average value get affected by PWM period?

a. Longer the PWM period, faster will be the variation in an average value

b. Shorter the PWM period, faster will be the variation in an average value

c. Shorter the PWM period, slower will be the variation in an average value

d. Longer the PWM period, slower will be the variation in an average value

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4. Which among the below stated components should be filtered for determining the cut-off frequency corresponding to the PW period of low-pass filter ?

a. Fundamental F_PWM & higher harmonics
b. Resonant F_PWM & higher harmonics
c. Slowly Varying DC components
d. Slowly Varying AC components

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