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Class 12 Physics: most repeated questions

Written by Dr. Hamza Farooq (Physics)

These short questions came back in more than one exam. The count is based on 6 past papers from 6 exams (BISE Gujranwala, BISE Multan, 2021 to 2026).

Asked in three or more exams

  1. How can you identify that which plate of a capacitor is positively charged?

    Appeared in 4 of 6 exams: 2021, 2025, 2026.

    See the papers

  2. Electric lines of force never cross, why?

    Appeared in 3 of 6 exams: 2021, 2025, 2026.

    See the papers

Asked in two exams

  1. How does doubling the frequency affect the reactance of a capacitor?

    Appeared in 2 of 6 exams: 2021, 2026.

    See the papers

  2. Why ordinary silicon diodes do not emit light?

    Appeared in 2 of 6 exams: 2021, 2025.

    See the papers

  3. Why does the picture on a TV screen become distorted when a magnet is brought near it?

    Appeared in 2 of 6 exams: 2022, 2025.

    See the papers

  4. What factors make fusion reaction difficult to achieve?

    Appeared in 2 of 6 exams: 2022, 2025.

    See the papers

  5. Why charge carriers are not present in the depletion region?

    Appeared in 2 of 6 exams: 2022, 2025.

    See the papers

  6. Does the induced emf in a circuit depends on the resistance of the circuit?

    Appeared in 2 of 6 exams: 2021, 2023.

    See the papers

How these were counted is explained on the repeated questions page. A question that appeared before may not appear again, so revise the whole syllabus. You can also browse the papers and practise chapter questions in the practice section.