Power Electronics MCQs with answers Page - 15

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A

Admin • 828.03K Points
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Q. In ac - dc conversion, when the switch is closed then the sum of voltages around the loop is

  • (A) Zero
  • (B) Non zero
  • (C) Equal to the sum of voltage when switch is open
  • (D) Twice of the voltage when switch is open

A

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Q. Choppers are used to control the DC voltage level.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. Cuk-converter is better than Buck converter in terms of the output voltage.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. What is the formula for output voltage for Buck converter?

  • (A) 8D×Vin
  • (B) 5D×Vin
  • (C) 2D×Vin
  • (D) D×Vin

A

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Q. What is the formula for output voltage for Boost converter?

  • (A) 8D×Vin
  • (B) 5D×Vin
  • (C) 2D×Vin
  • (D) D×Vin

A

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Q. Buck-Boost acts as Buck converter for duty cycle is equal to _________

  • (A) .9
  • (B) .7
  • (C) .6
  • (D) .4

A

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Q. Buck-Boost acts as Boost converter for duty cycle is equal to _________

  • (A) .8
  • (B) .1
  • (C) .2
  • (D) .4

A

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Q. Inductor and Capacitor in Buck converter are used to ___________

  • (A) Increase the cost
  • (B) Decrease the cost
  • (C) Filter out the harmonics
  • (D) Increase the harmonics

A

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Q. Calculate the output voltage of the Buck converter if the supply voltage is 789 V and duty cycle value is .9.

  • (A) 711.1 V
  • (B) 710.1 V
  • (C) 722.2 V
  • (D) 713.2 V

A

Admin • 828.03K Points
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Q. Calculate the output voltage of the Boost converter if the supply voltage is 156 V and duty cycle value is .4.

  • (A) 260 V
  • (B) 264 V
  • (C) 261 V
  • (D) 268 V

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