Q.1.
In the figure shown below, the capacitor C is used to
- a) maintain the load voltage constant
- b) protect the load
- c) protect the chopper switch (SW)
- d) maintain the load current constant
Q.2.
In the below shown step-up/step-down chopper circuit, when the switch (SW) is on
- a) current through inductor rises and the load voltage is zero
- b) current through inductor rises and the load voltage is Vs
- c) current through inductor decays and the load voltage is zero
- d) current through inductor decays and the load voltage is Vs
Q.3.
For a step-up/step-down chopper, if α (duty cycle) < 0.5 then
- a) Vo = Vs
- b) Vo < Vs
- c) Vo > Vs
- d) none of the mentioned
Q.4.
In the below shown step-up/step-down chopper circuit, when the chopper switch (SW) if first on and then off, then the current flows from path
- a) Vs-CH-L-Vs
- b) L-Load-D-L
- c) L-D-Load-L
- d) no current flows
Q.5.
For a step-up/step-down chopper, if current increases from I1 to I2 linearly during Ton, then find the energy stored in the inductor during Ton
- a) zero
- b) Vs x (I1 + I2)
- c) Vs x [ (I1 + I2)/2 ] x Ton
- d) Vs x [ (I1 + I2)/2 ] x T
Q.6.
A step-down chopper is also called as a
- a) first-quadrant chopper
- b) second-quadrant chopper
- c) third-quadrant chopper
- d) fourth-quadrant chopper
Q.7.
For the type-B chopper shown below
- a) during Ton, Vo = 0 and L stores energy
- b) during Ton, Vo is not 0 and L stores energy
- c) during Ton, Vo = 0 and L releases energy
- d) during Ton, Vo is not 0 and L releases energy
Q.8.
For the type-B chopper shown below
- a) during Toff, Vo = (E + Ldi/dt) and D is conducting
- b) during Toff, Vo = (E + Ldi/dt) and D is not-conducting
- c) during Toff, Vo = 0
- d) during Toff, Vo = Vs
Q.9.
The below given chopper is that of a
- a) step-up chopper
- b) step-down chopper
- c) step-up/step-down chopper
- d) depends on the duty cycle
Q.10.
The type-C chopper or two quadrant type-A chopper has
- a) type-A and type-B choppers in series
- b) type-A and type-B choppers in parallel
- c) two type-A choppers in series
- d) two type-A choppers in parallel