UTpaper

Free mock tests & test series

Question 40Asked in RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)

A copper wire has a resistance of 10 Ω. If it is replaced with a wire of the same material and length but twice the cross-sectional area, its resistance…

A copper wire has a resistance of 10 Ω. If it is replaced with a wire of the same material and length but twice the cross-sectional area, its resistance will be ______.
  1. A20 Ω
  2. B10 Ω
  3. C5 Ω
  4. D2.5 Ω
Show answerHide answer

Correct answer: (C) 5 Ω

From RRB JE CBT-1 PYQ 18 Dec 2024, Shift 1 (9:00 AM)

This is question 40 of RRB JE CBT-1 PYQ 18 Dec 2024, Shift 1 (9:00 AM). 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.