Q. A wire of resistance 5.5 ohm is drawn out uniformly so that its length is increased twice. Then its new resistance is
A) $44\Omega$
B) $42\Omega$
C) $40\Omega$
D) $22\Omega$
Explanation
(d) $R_{2} = n^{2}R = (2)^{2} \times 5.5 = 22\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.