Quiz (Boost and Buck Converter)

Chopper converters are

• AC to DC

• DC to AC

• DC to DC

• AC to AC

Which device can be used in a chopper circuit?

• BJT

• MOSFET

• GTO

• All of the mentioned

What is the duty cycle of a chopper?

• Ton/Toff

• Ton/T

• T/Ton

• Toff x Ton

The load voltage of a chopper can be controlled by varying the

• duty cycle

• switching frequency

• reactor position

• extinction angle

The values of duty cycle (α) lies between

• 0<α<1

  
  

• 0>α>-1

• 0<=α<=1

• 1<α<100

If T is the time period for a chopper circuit and α is its duty cycle, then the chopping frequency is

• Ton/α

• Toff/α

• α/Toff

• α/Ton

Find the output voltage expression for a step-down chopper with Vs as the input voltage and α as the duty cycle.

• Vo = Vs/α

  
  

• Vo = Vs x α

• Vo = Vs2/α

• Vo = 2Vs/απ

Choose the correct diagram for boost converter?

• 
• 
• 
• b & c

What is the formula for output voltage for Boost converter?

• 8D×Vin

• 5D×Vin

• 2D×Vin

• Vin ÷ (1-D)

Choose the correct diagram for buck converter?

• 
• 
• 
• a &b