Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Assertion (A): The turn on time of SCR is ab...
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Assertion (A): The turn on time of SCR is about 1 to 4 ms.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
- a)Both A and R are correct and R is correct explanation of A
- b)Both A and R correct but R is not correct explanation of A
- c)A is correct but R is wrong
- d)A is wrong but R is correct
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R):...
Assertion (A): The turn on time of SCR is about 1 to 4 ms.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
Explanation:
- An SCR (Silicon Controlled Rectifier) is a four-layer, three-junction, three-terminal semiconductor device. It is widely used in power electronics applications for switching and control purposes.
- The turn on time of an SCR is the time taken for the device to switch from the blocking state to the conducting state when a suitable gate signal is applied. It is determined by the time required for the minority carriers to be injected and reach the conducting regions of the device.
- The turn off time of an SCR is the time taken for the device to switch from the conducting state to the blocking state when the current through the device is reduced below the holding current. It is determined by the time required for the stored charge to be removed and for the device to regain its blocking characteristics.
- The turn on time of an SCR is typically in the range of 1 to 4 ms. This is because the injection of minority carriers takes a finite amount of time, and there may be some delays due to the gate circuitry.
- The turn off time of an SCR is typically longer than the turn on time and can vary depending on the device characteristics and the external circuit conditions. It is generally in the range of 10 to 300 ms. This is because the removal of stored charge takes longer than the injection of minority carriers.
- Both the assertion and the reason are correct. The turn on time of an SCR is indeed about 1 to 4 ms, and the turn off time is about 10 to 300 ms.
- The reason provided also correctly explains why the turn off time is longer than the turn on time. The removal of stored charge takes longer than the injection of minority carriers, leading to a longer turn off time.
Therefore, both assertion (A) and reason (R) are correct, and reason (R) is the correct explanation of assertion (A). Hence, option B is the correct answer.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
Explanation:
- An SCR (Silicon Controlled Rectifier) is a four-layer, three-junction, three-terminal semiconductor device. It is widely used in power electronics applications for switching and control purposes.
- The turn on time of an SCR is the time taken for the device to switch from the blocking state to the conducting state when a suitable gate signal is applied. It is determined by the time required for the minority carriers to be injected and reach the conducting regions of the device.
- The turn off time of an SCR is the time taken for the device to switch from the conducting state to the blocking state when the current through the device is reduced below the holding current. It is determined by the time required for the stored charge to be removed and for the device to regain its blocking characteristics.
- The turn on time of an SCR is typically in the range of 1 to 4 ms. This is because the injection of minority carriers takes a finite amount of time, and there may be some delays due to the gate circuitry.
- The turn off time of an SCR is typically longer than the turn on time and can vary depending on the device characteristics and the external circuit conditions. It is generally in the range of 10 to 300 ms. This is because the removal of stored charge takes longer than the injection of minority carriers.
- Both the assertion and the reason are correct. The turn on time of an SCR is indeed about 1 to 4 ms, and the turn off time is about 10 to 300 ms.
- The reason provided also correctly explains why the turn off time is longer than the turn on time. The removal of stored charge takes longer than the injection of minority carriers, leading to a longer turn off time.
Therefore, both assertion (A) and reason (R) are correct, and reason (R) is the correct explanation of assertion (A). Hence, option B is the correct answer.
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Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R):...
Assertion (A): The turn on time of SCR is about 1 to 4 ms.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
Explanation:
SCR (Silicon Controlled Rectifier) is a four-layer, three-junction, PNPN semiconductor device which is widely used in power electronic circuits.
Turn on time: The turn on time of an SCR is the time taken for the SCR to switch from the off state to the on state when a suitable gate signal is applied. It is determined by the time required for the forward-biased junction J2 to reach the threshold voltage for conduction.
The turn on time of an SCR is typically in the range of 1 to 4 ms. This time is required for the device to fully turn on and start conducting current.
Turn off time: The turn off time of an SCR is the time taken for the SCR to switch from the on state to the off state when the anode current falls below the holding current or when a reverse bias voltage is applied across the device. It is determined by the time required for the reverse-biased junction J1 to recover from the conducting state and block the current flow.
The turn off time of an SCR is typically in the range of 10 to 300 ms. This time is required for the device to fully turn off and stop conducting current.
Explanation of Assertion (A):
The turn on time of an SCR is indeed about 1 to 4 ms. This is the time required for the device to switch from the off state to the on state when a suitable gate signal is applied.
Explanation of Reason (R):
The turn off time of an SCR is about 10 to 300 ms. This is the time required for the device to switch from the on state to the off state when the anode current falls below the holding current or when a reverse bias voltage is applied across the device.
Conclusion:
Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation of Assertion (A). The turn on time of an SCR is indeed about 1 to 4 ms, and this is because the turn off time of an SCR is about 10 to 300 ms.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
Explanation:
SCR (Silicon Controlled Rectifier) is a four-layer, three-junction, PNPN semiconductor device which is widely used in power electronic circuits.
Turn on time: The turn on time of an SCR is the time taken for the SCR to switch from the off state to the on state when a suitable gate signal is applied. It is determined by the time required for the forward-biased junction J2 to reach the threshold voltage for conduction.
The turn on time of an SCR is typically in the range of 1 to 4 ms. This time is required for the device to fully turn on and start conducting current.
Turn off time: The turn off time of an SCR is the time taken for the SCR to switch from the on state to the off state when the anode current falls below the holding current or when a reverse bias voltage is applied across the device. It is determined by the time required for the reverse-biased junction J1 to recover from the conducting state and block the current flow.
The turn off time of an SCR is typically in the range of 10 to 300 ms. This time is required for the device to fully turn off and stop conducting current.
Explanation of Assertion (A):
The turn on time of an SCR is indeed about 1 to 4 ms. This is the time required for the device to switch from the off state to the on state when a suitable gate signal is applied.
Explanation of Reason (R):
The turn off time of an SCR is about 10 to 300 ms. This is the time required for the device to switch from the on state to the off state when the anode current falls below the holding current or when a reverse bias voltage is applied across the device.
Conclusion:
Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation of Assertion (A). The turn on time of an SCR is indeed about 1 to 4 ms, and this is because the turn off time of an SCR is about 10 to 300 ms.
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Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer?.
Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect 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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ample number of questions to practice Assertion (A): The turn on time of SCR is about 1 to 4 ms.Reason (R): The turn off time of SCR is about 10 to 300 ms.a)Both A and R are correct and R is correct explanation of Ab)Both A and R correct but R is not correct explanation of Ac)A is correct but R is wrongd)A is wrong but R is correctCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
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