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Assertion (A): The commutation overlap is more predominant is semiconverters than in full converters.
Reason (R): The commutation period in seconds, when outgoing and incoming SCRs are conducting, is known as the overlap period.
  • a)
    Both A and R are true and R is the correct explanation of A.
  • b)
    Both A and R are true but R is not the correct explanation of A.
  • c)
    A is true but R is false.
  • d)
    A is false but R is true.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Assertion (A): The commutation overlap is more predominant is semiconv...
The commutation overlap is more predominant in full converter than in semi converter. Hence, assertion is a false statement.
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Assertion (A): The commutation overlap is more predominant is semiconv...
Assertion (A): The commutation overlap is more predominant in semiconverters than in full converters.
Reason (R): The commutation period in seconds, when outgoing and incoming SCRs are conducting, is known as the overlap period.

Explanation:
To understand the assertion and reason given in the question, we need to first understand what commutation overlap is and how it relates to semiconverters and full converters.

Commutation Overlap:
Commutation overlap refers to the time period during which both the outgoing and incoming thyristors (or SCRs - Silicon Controlled Rectifiers) are conducting simultaneously in a converter circuit. This overlapping time is necessary to ensure a smooth commutation process and to avoid any sudden change in the current or voltage waveform.

Semiconverters:
A semiconverter is a type of converter circuit that uses only one thyristor (SCR) in the output stage. It can convert AC to DC or DC to AC, depending on the configuration. In a semiconverter, the commutation overlap is necessary because there is only one thyristor to handle the current flow.

Full Converters:
A full converter is a type of converter circuit that uses two thyristors (SCRs) in the output stage. It can convert AC to DC or DC to AC. In a full converter, the commutation overlap is not as predominant as in semiconverters because there are two thyristors to handle the current flow. The overlapping time is reduced in full converters to minimize the power loss and improve the overall efficiency of the system.

Analysis:
From the given information, we can conclude the following:

- Assertion (A) states that the commutation overlap is more predominant in semiconverters than in full converters.
- Reason (R) states that the commutation period in seconds, when outgoing and incoming SCRs are conducting, is known as the overlap period.

Comparison:
Based on the explanation provided above, we can analyze the given assertion and reason as follows:

- Assertion (A) is true because in semiconverters, there is only one thyristor to handle the current flow, so the commutation overlap is more predominant.
- Reason (R) is also true because the commutation period, when both the outgoing and incoming SCRs are conducting, is indeed known as the overlap period.

Conclusion:
In conclusion, both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A). The reason provided explains the definition of the overlap period but does not explain why it is more predominant in semiconverters compared to full converters. Therefore, the correct answer is option 'D'.
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Assertion (A): The commutation overlap is more predominant is semiconverters than in full converters.Reason (R): The commutation period in seconds, when outgoing and incoming SCRs are conducting, is known as the overlap period.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?
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