UPSC via PYQs
UPSC Prelims 1990Question 51Science & Technology

Assertion (A): Unlike photographic film, which can be used only once, video tapes can be reused several times. Reason (R): Photography involves chemical change but video recording is a physical change.

Options

  1. (a)Both A and R are true and R is the correct explanation of A
  2. (b)Both A and R are true but R is not a correct explanation of A
  3. (c)A is true but R is false
  4. (d)A is false but R is true

The full breakdown is part of the paid archive

This question's answer, explanation and links to every related question across 48 years (1979–2026) are inside the app. The two most recent years are free to read in full — no account needed.

See what's inside →

Learn this in NCERT

Related questions the exam has asked

Independent UPSC previous-year-questions study tool — not affiliated with or endorsed by the UPSC. Question text is reproduced from publicly released UPSC examination papers.
UPSCviaPYQs · Privacy · Terms