UPSC 1996: The alpha particle carries two positive charges. Its mass is very nearly equal to that of

The correct answer is option (b): an atom of helium. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.

This question was asked in UPSC CSE Prelims 1996, GS Paper 1, as Question 127. It falls under Science & Technology > Physics.

This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.

UPSC has asked 101 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.