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MCQEasyJEE 2023AC Generator & Transformer

JEE Physics 2023 Question with Solution

Match the List I with List II:

Table labeled List I and List II with entries A. AC generator, B. Transformer, C. Resonance Phenomenon, D. Sharpness of Resonance and I. Presence of both L and C, II. Electromagnetic Induction, III. Quality Factor, IV. Mutual Inductance.Supplementary rendered table image for the match-the-following question showing List I and List II items for AC generator, transformer, resonance phenomenon, and sharpness of resonance.

Choose the correct answer from the options given below:

  • A

    A-IV, B-II, C-I, D-III

  • B

    A-II, B-I, C-III, D-IV

  • C

    A-II, B-IV, C-I, D-III

  • D

    A-IV, B-III, C-I, D-II

Answer

Correct answer:B

Step-by-step solution

Standard Method

Given: A match-the-following question relating devices and resonance terms with their governing concepts.

Find: The correct matching between List I and List II.

From the given explanation:

  • An AC generator operates on Electromagnetic Induction.
  • A Transformer operates based on Mutual Inductance.
  • Resonance phenomenon occurs due to the Presence of both L and C.
  • Sharpness of Resonance is linked to Quality Factor.

Therefore, the matching is:

  • A - II
  • B - IV
  • C - I
  • D - III

This corresponds to Option C.

The solution states "The Correct Option is B", but the working clearly matches Option C. Therefore, the defensible correct option is C.

Common mistakes

  • Matching Transformer with Electromagnetic Induction directly is incorrect here because the transformer specifically works through mutual inductance between two coils. Use the more precise concept when matching.

  • Confusing Resonance phenomenon with Quality Factor is incorrect because resonance requires the presence of both L and C, whereas Quality Factor describes the sharpness of resonance. Separate the occurrence from its measure.

  • Treating Sharpness of Resonance as the same as the condition for resonance is wrong. The condition involves reactive components L and C, while sharpness is characterized by the Quality Factor.

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