Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Consider the following statements:1. DC chopp...
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Consider the following statements:
1. DC chopper can be used in both dc and ac drives.
2. For four-quadrant operation dual converter is required.
3. Output voltage from a chopper circuit depends both on load current and duty cycle
4. In a step-down source, current can be discontinuous if duty cycle is low.
Which of the statements given above are correct?
1. DC chopper can be used in both dc and ac drives.
2. For four-quadrant operation dual converter is required.
3. Output voltage from a chopper circuit depends both on load current and duty cycle
4. In a step-down source, current can be discontinuous if duty cycle is low.
Which of the statements given above are correct?
- a)1, 2 and 3
- b)2 and 4
- c)1, 3 and 4
- d)1 and 4
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Consider the following statements:1. DC chopper can be used in both dc...
• DC choppers can be used in only dc drives.
• Output voltage from a chopper circuit depends only on duty cycle and is independent of load current.
Hence, statements 1 and 3 are not correct.
• Output voltage from a chopper circuit depends only on duty cycle and is independent of load current.
Hence, statements 1 and 3 are not correct.
Most Upvoted Answer
Consider the following statements:1. DC chopper can be used in both dc...
Statement 1: DC chopper can be used in both DC and AC drives.
This statement is incorrect. A DC chopper is primarily used in DC drives to control the speed of DC motors. It is not commonly used in AC drives, which typically use other types of converters such as inverters.
Statement 2: For four-quadrant operation, a dual converter is required.
This statement is correct. Four-quadrant operation refers to the ability to control the speed and direction of rotation of a motor in both forward and reverse directions. To achieve this, a dual converter is commonly used, which consists of two single-phase converters connected back-to-back. This allows bidirectional power flow and control in all four quadrants.
Statement 3: Output voltage from a chopper circuit depends on both load current and duty cycle.
This statement is correct. In a chopper circuit, the output voltage is controlled by adjusting the duty cycle of the chopper switch. The duty cycle is the ratio of the time the switch is on to the total switching period. By varying the duty cycle, the average voltage applied to the load can be controlled. Additionally, the output voltage also depends on the load current, as the voltage drop across the load impedance affects the overall output voltage.
Statement 4: In a step-down source, current can be discontinuous if the duty cycle is low.
This statement is correct. In a step-down chopper circuit, the duty cycle determines the amount of time the switch is on, and hence, the duration of the current flow through the load. If the duty cycle is low, the switch is on for a shorter period, resulting in discontinuous current flow. This occurs because the output voltage is lower than the input voltage, and the energy stored in the inductor is not sufficient to maintain continuous current flow during the off period of the switch.
In conclusion, the correct statements are 2 and 4. A DC chopper is primarily used in DC drives, and a dual converter is required for four-quadrant operation. The output voltage in a chopper circuit depends on both load current and duty cycle. In a step-down source, current can be discontinuous if the duty cycle is low.
This statement is incorrect. A DC chopper is primarily used in DC drives to control the speed of DC motors. It is not commonly used in AC drives, which typically use other types of converters such as inverters.
Statement 2: For four-quadrant operation, a dual converter is required.
This statement is correct. Four-quadrant operation refers to the ability to control the speed and direction of rotation of a motor in both forward and reverse directions. To achieve this, a dual converter is commonly used, which consists of two single-phase converters connected back-to-back. This allows bidirectional power flow and control in all four quadrants.
Statement 3: Output voltage from a chopper circuit depends on both load current and duty cycle.
This statement is correct. In a chopper circuit, the output voltage is controlled by adjusting the duty cycle of the chopper switch. The duty cycle is the ratio of the time the switch is on to the total switching period. By varying the duty cycle, the average voltage applied to the load can be controlled. Additionally, the output voltage also depends on the load current, as the voltage drop across the load impedance affects the overall output voltage.
Statement 4: In a step-down source, current can be discontinuous if the duty cycle is low.
This statement is correct. In a step-down chopper circuit, the duty cycle determines the amount of time the switch is on, and hence, the duration of the current flow through the load. If the duty cycle is low, the switch is on for a shorter period, resulting in discontinuous current flow. This occurs because the output voltage is lower than the input voltage, and the energy stored in the inductor is not sufficient to maintain continuous current flow during the off period of the switch.
In conclusion, the correct statements are 2 and 4. A DC chopper is primarily used in DC drives, and a dual converter is required for four-quadrant operation. The output voltage in a chopper circuit depends on both load current and duty cycle. In a step-down source, current can be discontinuous if the duty cycle is low.
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Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer?
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Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer?.
Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer?.
Solutions for Consider the following statements:1. DC chopper can be used in both dc and ac drives.2. For four-quadrant operation dual converter is required.3. Output voltage from a chopper circuit depends both on load current and duty cycle4. In a step-down source, current can be discontinuous if duty cycle is low.Which of the statements given above are correct?a)1, 2 and 3 b)2 and 4c)1, 3 and 4 d)1 and 4Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
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