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working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P or Q, some resistance is seen on the multimeter. Which of the following is true for the transistor?
  • a)
    It is an n-p-n transistor with R as collector.
  • b)
    it is an n-p-n transistor with R as base.
  • c)
    It is a p-n-p transistor with R as collector.
  • d)
    It is a p-n-p transistor with R as emitter.
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
working transistor with its three legs marked P, Q and R is tested u...
Since no conduction is found when the multimeter is connected across P and Q, it means either both P and Q are n type or p type. So, it means R is base. When R is connected to common terminal and conduction is seen when other terminal is connected to P or Q, it means the transistor is n-p-n with R as base.
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Community Answer
working transistor with its three legs marked P, Q and R is tested u...
Explanation:

The given information states that when the common (negative) terminal of the multimeter is connected to the leg marked R and the other (positive) terminal is connected to either leg P or leg Q, some resistance is observed on the multimeter. Based on this observation, we can conclude the following:

1. No conduction between P and Q:
Since no conduction is observed between legs P and Q, it indicates that there is no direct connection between them. This implies that the transistor is not a diode or a short circuit.

2. Resistance observed between R and P or Q:
When the multimeter is connected between the leg marked R and either leg P or leg Q, some resistance is seen. This indicates that there is a path for current flow between R and P/Q, but it is not a short circuit. This suggests that the transistor is not an open circuit.

Based on the above observations, we can conclude that the transistor is a working transistor. Now, let's analyze the given options to determine the correct answer.

Option A: It is an n-p-n transistor with R as collector.
If R is the collector, then there should be a direct connection between R and P or Q. However, the given information states that there is no conduction between P and Q, which contradicts this option. Therefore, option A is incorrect.

Option B: It is an n-p-n transistor with R as base.
If R is the base, then there should be a resistance observed between R and P or Q. This matches the given information, where resistance is seen on the multimeter when connected between R and P or Q. Hence, option B is correct.

Option C: It is a p-n-p transistor with R as collector.
This option assumes that the transistor is a p-n-p transistor. However, based on the given information, there is no conduction between P and Q, which contradicts the assumption of a p-n-p transistor. Therefore, option C is incorrect.

Option D: It is a p-n-p transistor with R as emitter.
This option assumes that the transistor is a p-n-p transistor. However, based on the given information, there is no conduction between P and Q, which contradicts the assumption of a p-n-p transistor. Therefore, option D is incorrect.

Conclusion:
Based on the given observations, the correct answer is option B: It is an n-p-n transistor with R as base.
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working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P or Q, some resistance is seen on the multimeter. Which of the following is true for the transistor?a)It is an n-p-n transistor with R as collector.b)it is an n-p-n transistor with R as base.c)It is a p-n-p transistor with R as collector.d)It is a p-n-p transistor with R as emitter.Correct answer is option 'B'. Can you explain this answer?
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working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P or Q, some resistance is seen on the multimeter. Which of the following is true for the transistor?a)It is an n-p-n transistor with R as collector.b)it is an n-p-n transistor with R as base.c)It is a p-n-p transistor with R as collector.d)It is a p-n-p transistor with R as emitter.Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P or Q, some resistance is seen on the multimeter. Which of the following is true for the transistor?a)It is an n-p-n transistor with R as collector.b)it is an n-p-n transistor with R as base.c)It is a p-n-p transistor with R as collector.d)It is a p-n-p transistor with R as emitter.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to P or Q, some resistance is seen on the multimeter. Which of the following is true for the transistor?a)It is an n-p-n transistor with R as collector.b)it is an n-p-n transistor with R as base.c)It is a p-n-p transistor with R as collector.d)It is a p-n-p transistor with R as emitter.Correct answer is option 'B'. Can you explain this answer?.
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