IE Class QuiZ

For an SCR, di/dt protection is achieved through the use of

• R in series with SCR

• L in series with SCR

• RL in series with SCR

• RLC in series with SCR

In which mode of operation, Self commutation can achieved

• 180

• 120

• 360

• 270

Among the following which component is best suitable for inverter application?

• SCR

• BJT

• Mosfet

• IGBT

Which power electronics switch can be the best for boost converter?

• SCR

• MOSFET

• Mechanical Switch

• Triac

What is the voltage equation of step up / down chopper with α as the duty cycle and Vs as the dc input voltage is

• Vs / (1 – α)

• Vs / (1 – α)

• Vs * α / (1-α)

• Vs * α/ (1+α)

What will be the output voltage for a Buck-Boost Converter, if α = 0.5?

• Vo = Vs

• Vo < Vs

• Vo > Vs

• Data insufficient

Find the output voltage expression for a boost converter with Vs as the input voltage and α as the duty cycle

• Vo = Vs/α

• Vo = Vs x α

• Vo = Vs/(1-α)

• Vo = 2Vs/απ

Name the chopper in which output voltage is greater than input voltage

• Step up Chopper

• Step down Chopper

• BuckBoost

• Buck

What type of conversion takes place in a Chopper?

• AC to DC

• DC to AC

• DC to DC

• AC to AC

Name the chopper which is used for regenerative braking of dc motor

• CLASS A CHOPPER

• CLASS B CHOPPER

• CLASS

  C CHOPPER

• CLASS D CHOPPER