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  9. Q138

RRB Group D (Level-1 posts) 2014 · Question 138 of 324

The polarity of an unmarked horseshoe magnet can be determined by using

  1. AA magnetic compassCorrect
  2. BAn electroscope
  3. CAnother unmarked bar magnet
  4. DA charged glass rod

Answer: A. A magnetic compass

Official answer key verified. Detailed explanation coming soon.

Source: Railway Group-D Questions – Gorakhpur (16 Nov 2014) · reliable-secondary

← Q137View full paper (324 questions)Q139 →

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