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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2025 · Paper I, General Studies · Q4 of 120

Geo-Scientist Prelims 2025 General Studies Q4: A cyclotron has an oscillator frequency of 12×10^6 Hz and ‘Dee’…

QuestionMagnetism / cyclotron

A cyclotron has an oscillator frequency of \(12\times10^6\) Hz and ‘Dee’ radius of 21 inches. The value of magnetic induction (field) needed to accelerate a deuteron (mass = \(3.34\times10^{-27}\) kg and charge = \(1.6\times10^{-19}\) C) is

  1. (a) 1·573 tesla
  2. (b) 157·3 tesla
  3. (c) 15·73 tesla
  4. (d) 0·157 tesla

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