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Question 30Asked in RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)

A wire of a given material has length l and cross-sectional area A , and its resistance is

A wire of a given material has length l and cross-sectional area A , and its resistance is 9 Ω. Another wire of the same material has length l/3 and cross-sectional area 3A. What will be the resistance of the second wire?
  1. A0.5 Ω
  2. B6 Ω
  3. C2 Ω
  4. D1 Ω
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Correct answer: (D) 1 Ω

From RRB JE CBT-1 PYQ 20 Feb 2026, Shift 3 (4:30 PM)

This is question 30 of RRB JE CBT-1 PYQ 20 Feb 2026, Shift 3 (4:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.