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Central Board of Secondary Education · English · Class 10 · Science

Board exam · Science · 2026

15 questions · One at a time

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15
MCQ2 marks

If a wire of resistance RR  is melted and recast to half of its original length, its new resistance will be:

  • A.R4\frac{R}{4}Correct
  • B.R2\frac{R}{2}
  • C.2R2R
  • D.4R4R
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