quiz 2 DJM40103

Choppers converter

• AC to Dc

• AC TO AC

• DC TO DC

• DC TO AC

Which device can be used in a chopper circuit?

• MOSFET

• BJT

• GTO

• ALL OF THE MENTIONED

What is the duty cycle of a chopper ?

• Ton/Toff

• T/Ton

• Ton/T

• Toff x Ton

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

• duty cycle

• firing angle

• reactor position

• extinction angle

In a step down chopper, if Vs = 100 V and the chopper is operated at a duty cycle of 75 %. Find the output voltage.

• 100 V

• 75 V

• 25 V

Find the output voltage for a step-up chopper when it is operated at a duty cycle of 50 % and Vs = 240 V.

• 240 V

• 480 V

• 560 V

• 120 V

A step - down choppers can be used in

• Electric traction

• Machine tools

• Electric vehicles

• All of these

Choppers are used to control the DC voltage level.

• True

• FALSE

A step-down chopper is also called as a

• first-quadrant chopper

• second-quadrant chopper

• third-quadrant chopper

• fourth-quadrant chopper

If a step up chopper’s switch is always kept off then (ideally)

• Vo = 0

• Vo = Vs

• Vo = ∞

• Vo > Vs