Bissoy.com
Doctors Medicines MCQs Q&A

In the above figure, the load voltage is positive whereas the load current is negative. Thus, the current flows out of the load and into the source. Identify the type of chopper shown in the figure.

In the above figure, the load voltage is positive whereas the load current is negative. Thus, the current flows out of the load and into the source. Identify the type of chopper shown in the figure. Correct Answer Class B Chopper

​Type B chopper (Second quadrant chopper):

Important Points

Type of chopper

Operating region

The direction of voltage and current

Type A chopper

First quadrant

[ alt="F1 U.B Madhu 16.04.20 D5" src="//storage.googleapis.com/tb-img/production/20/04/F1_U.B_Madhu_16.04.20_D5.png" style="width: 142px; height: 138px;">

Both voltage and current are positive

Type B chopper

Second quadrant

[ alt="F1 U.B Madhu 16.04.20 D6" src="//storage.googleapis.com/tb-img/production/20/04/F1_U.B_Madhu_16.04.20_D6.png" style="width: 161px; height: 152px;">

Voltage is positive but the current is negative

Two quadrant Type A chopper or Type C chopper

First quadrant and second quadrant

[ alt="F1 U.B Madhu 16.04.20 D7" src="//storage.googleapis.com/tb-img/production/20/04/F1_U.B_Madhu_16.04.20_D7.png" style="width: 160px; height: 154px;">

Voltage is positive but the current may be positive or negative

Two quadrant Type B chopper or Type D chopper

First quadrant and fourth quadrant

[ alt="F1 U.B Madhu 16.04.20 D2" src="//storage.googleapis.com/tb-img/production/20/04/F1_U.B_Madhu_16.04.20_D2.png" style="width: 156px; height: 162px;">

Current is positive but the voltage may be positive or negative

Four quadrant chopper or Type E chopper

All the four quadrants

[ alt="F1 U.B Madhu 16.04.20 D8" src="//storage.googleapis.com/tb-img/production/20/04/F1_U.B_Madhu_16.04.20_D8.png" style="width: 151px; height: 172px;">

Both current and voltage may be positive or negative

Related Questions

Consider the following statements regarding Thyristor: 1. It conducts when forward biased and positive current flows through the gate 2. It conducts when forward biased and negative current flows through the gate 3. It commutates when reverse biased and negative current flows through the gate 4. It commutates when the gate current is withdrawn Which of these statement(s) is/are correct?
Which of the following statements are correct for an ideal constant voltage source? 1. Its output voltage remains absolutely constant whatever the change in load current. 2. It possesses zero internal resistance so that internal voltage drop in the source is zero. 3. Output voltage is provided by the source would remain constant irrespective of the amount of current drawn from it. 4. Output voltage provided by the source varies with the amount of current drawn from it.
A step down chopper has Vs = 230 V and R = 10 Ω. For a duty cycle of 0.4, the power taken by the chopper is 2097 Watts. Find the chopper efficiency. Take the voltage drop across the chopper switch as 2 V.
Availability of drinking water is continuously decreasing. The government decided to identify those sources of drinking water which getting polluted. The following table depicts the number of polluted sources in a district. Source of drinking water getting polluted Number Wells 24 Handpump 12 Dam 12 Borewell 6 Ponds 18 The pictograph table for the above table will be (A) Source of drinking water getting polluted Number symbol = 6 source Wells Handpump Dam Borewell Ponds (B) Source of drinking water getting polluted Number symbol  = 6 source Wells Handpump Dam Borewell Ponds (C) Source of drinking water getting polluted Number symbol  = 6 source Wells Handpump Dam Borewell Ponds (D) Source of drinking water getting polluted Number symbol  = 6 source Wells Handpump Dam Borewell Ponds
For a step-down chopper shown in the figure below, dc source voltage = 230 V and the voltage drop across the chopper = 2 V. Find the value of average output voltage for a duty cycle of 0.4.
For the step-down chopper shown in the figure below, dc source voltage = 230 V and the voltage drop across the chopper = 2 V. Find the value of rms output voltage for a duty cycle of 0.4.
Consider the following statements regarding reciprocity theorem : 1. In any passive linear bilateral network, if the single voltage source Vx, in branch x produces the current response Iy, in branch y, then the removal of the voltage source from branch x and its insertion in branch y will produce the current response iy in branch x. 2. The interchange of an ideal voltage source and an ideal ammeter in any passive, linear, bilateral circuit will not change the ammeter reading. 3. The interchange of an ideal current source and an ideal voltmeter in any passive linear bilateral circuit will change the voltmeter reading. Which of the above statements are correct ?
Consider the following statements regarding n-channel JFET: 1. The maximum drain current IDSS occurs when gate-to-source voltage VGS = 0 V and drain-to-source voltage VDS ≥ |VP|. (VP is pinch-off voltage). 2. For gate-to-source voltage VGS less than the pinch-off level, the drain current is 0 A. 3. For all levels of VGS between 0 V and the pinch-off level, the current ID will range between IDSS and 0 A, respectively. which of the above statements are correct ?
For the step-down chopper shown in the figure below, dc source voltage = 230 V. Find the power input to the chopper If load of R = 10 Ω is connected. Duty cycle = 40 %.
Find the average output voltage for a type D chopper if it is given a dc supply of 220 V. Chopper frequency is 2 kHz and both the chopper switches are operated for 0.3 ms.