MCQMediumJEE 2023Faraday's Laws of EMI

JEE Physics 2023 Question with Solution

Which of the following scenarios will result in an induced emf in a coil?

  • A

    A and B only

  • B

    C and D only

  • C

    B and C only

  • D

    A and C only

Answer

Correct answer:B

Step-by-step solution

Standard Method

Given: the solution is inconsistent with the question text. The question asks about induced emf in a coil, but the solution discusses basic character of oxides such as Tl2O2\mathrm{Tl_2O_2} and B2O3\mathrm{B_2O_3}.

Find: The correct option from the provided answer key.

The only reliable piece of aligned information available is the source answer key:

Correct Answer: (2) C and D only\text{Correct Answer: (2) C and D only}

Mapping option (2)(2) to the given choices gives option B.

Therefore, the correct option is B.

the solution mismatch noted

The provided worked solutions cannot be used to derive the answer because they refer to a different chemistry question about oxide basicity. Since those steps do not correspond to the present question, they are not valid support for this problem.

Using only the dependable mapping from the answer field:

  • Option (1)(1) \rightarrow A
  • Option (2)(2) \rightarrow B
  • Option (3)(3) \rightarrow C
  • Option (4)(4) \rightarrow D

Hence, Correct Answer: (2) corresponds to B.

Therefore, the correct option is B.

Common mistakes

  • Using the mismatched the solution to justify the answer is incorrect because it discusses oxide basicity, not electromagnetic induction. Use the question text and the provided correct-answer mapping instead.

  • Misreading the numbering-to-letter conversion can lead to the wrong option. For MCQ mapping, (1)A(1) \rightarrow \text{A}, (2)B(2) \rightarrow \text{B}, (3)C(3) \rightarrow \text{C}, and (4)D(4) \rightarrow \text{D}.

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