Current Electricity Charging Discharging Of Capacitors Question 695
Question: A 4 ohm resistance wire is bent through $ 180{}^\circ C $ at its mid-point and the two halves are twisted together. Then the resistance is
Options:
A) $ 1\Omega $
B) $ 2\Omega $
C) $ 5\Omega $
D) $ 8\Omega $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ R=\rho \ell /A;R’=\frac{\rho \ell ‘}{A’}=\frac{\rho ( \ell /2 )}{2A}=\frac{1}{4}R. $
BETA
