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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 146 of 200

Q146
General SciencePhysics
A 220 volt A.C. is more dangerous than 220 volt D.C. because
  1. a.the A.C. attracts.
  2. b.the D.C. repels.
  3. c.the body offers less resistance to A.C.
  4. d.peak voltage for A.C. is much larger than 220 volt.

Answer: (D) peak voltage for A.C. is much larger than 220 volt.

220 V is the rms value of mains AC, and its peak value is $220\sqrt{2} \approx 311$ V, so the body is exposed to much higher instantaneous voltage than with 220 V DC. The 'attracts/repels' options are not physics.

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