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Question 15Asked in RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)

A wire has a resistance of R. If its length is increased by a factor of 8 and its cross-sectional area is decreased by a factor of 4, what is its new…

A wire has a resistance of R. If its length is increased by a factor of 8 and its cross-sectional area is decreased by a factor of 4, what is its new resistance (R')?
  1. AR' = 8 R
  2. BR' = 16 R
  3. CR' = 32 R
  4. DR' = 2 R
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Correct answer: (C) R' = 32 R

From RRB JE CBT-1 PYQ 16 Dec 2024, Shift 2 (12:45 PM)

This is question 15 of RRB JE CBT-1 PYQ 16 Dec 2024, Shift 2 (12:45 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.