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Which of the following statements is not true in regard to storage time of a diode?
- a)During this time, the diode is reverse-biased
- b)The diode conducts during this time
- c)It is due to the time taken by carriers to depart from the function when the diode is reverse-biased
- d)During this time the diode current is zero
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is not true in regard to storage tim...
Introduction:
The storage time of a diode refers to the time taken by the minority carriers to depart from the region when the diode is reverse-biased. During this time, the diode is reverse-biased, and the diode current is not zero. The given options state different statements about the storage time of a diode, and we need to identify the statement that is not true.
Explanation:
Let's analyze each option to determine the true and false statements:
a) During this time, the diode is reverse-biased:
This statement is true. During the storage time of a diode, it remains reverse-biased. When the diode is reverse-biased, the majority carriers (electrons in the N-region and holes in the P-region) are repelled away from the junction, causing a depletion region to form.
b) The diode conducts during this time:
This statement is true. Even though the diode is reverse-biased during the storage time, a small amount of current, called the reverse recovery current, flows through the diode. This is because the minority carriers, which were stored in the depletion region during the forward bias operation, take some time to recombine and leave the region. This current is typically small but not zero.
c) It is due to the time taken by carriers to depart from the function when the diode is reverse-biased:
This statement is true. The storage time is precisely the time taken by the minority carriers to depart from the region when the diode transitions from forward bias to reverse bias. During this time, the stored minority carriers gradually recombine and leave the depletion region.
d) During this time, the diode current is zero:
This statement is false. The diode current is not zero during the storage time. As mentioned earlier, a small amount of reverse recovery current flows through the diode during this time. This current gradually decreases as the minority carriers depart from the diode.
Conclusion:
Among the given options, option 'D' is the statement that is not true. The diode current is not zero during the storage time. Instead, a small amount of reverse recovery current flows through the diode.
The storage time of a diode refers to the time taken by the minority carriers to depart from the region when the diode is reverse-biased. During this time, the diode is reverse-biased, and the diode current is not zero. The given options state different statements about the storage time of a diode, and we need to identify the statement that is not true.
Explanation:
Let's analyze each option to determine the true and false statements:
a) During this time, the diode is reverse-biased:
This statement is true. During the storage time of a diode, it remains reverse-biased. When the diode is reverse-biased, the majority carriers (electrons in the N-region and holes in the P-region) are repelled away from the junction, causing a depletion region to form.
b) The diode conducts during this time:
This statement is true. Even though the diode is reverse-biased during the storage time, a small amount of current, called the reverse recovery current, flows through the diode. This is because the minority carriers, which were stored in the depletion region during the forward bias operation, take some time to recombine and leave the region. This current is typically small but not zero.
c) It is due to the time taken by carriers to depart from the function when the diode is reverse-biased:
This statement is true. The storage time is precisely the time taken by the minority carriers to depart from the region when the diode transitions from forward bias to reverse bias. During this time, the stored minority carriers gradually recombine and leave the depletion region.
d) During this time, the diode current is zero:
This statement is false. The diode current is not zero during the storage time. As mentioned earlier, a small amount of reverse recovery current flows through the diode during this time. This current gradually decreases as the minority carriers depart from the diode.
Conclusion:
Among the given options, option 'D' is the statement that is not true. The diode current is not zero during the storage time. Instead, a small amount of reverse recovery current flows through the diode.
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Which of the following statements is not true in regard to storage time of a diode?a)During this time, the diode is reverse-biasedb)The diode conducts during this timec)It is due to the time taken by carriers to depart from the function when the diode is reverse-biasedd)During this time the diode current is zeroCorrect answer is option 'D'. Can you explain this answer?
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